Zhang, Yan Gao, and Yun-Xia Luan. 2017 «Revisiting the Phylogeny of Wolbachia in Collembola». Ecology and Evolution 7 (7): 2009-17. https://doi.org/10.1002/ece3.2738.
Macías-Ordóñez, Rogelio, Glauco Machado, Abel Pérez-González, and Jeffrey W. Shultz. 2010. «Genitalic Evolution in Opiliones». In The Evolution of Primary Sexual Characters in Animals, edited by Janet L. Leonard and Alex Córdoba-Aguilar, 285–306. New York: Oxford University Press.
Marks, Kathy. 2009. «Henry the Tuatara Is a Dad at 111». The Independent, January 26, 2009. https://www.independent.co.uk/news/world/australasiahenry-the-tuatara-is-a-dad-at-111-1516628.html.
Marshall, Donald S., and Robert C. Suggs, eds. 1971. Human Sexual Behavior: Variations in the Ethnographic Spectrum. New York: Basic Books.
Marshall, Francis Hugh Adam. 1960. Physiology of Reproduction, vol. 1, part 2. London: Longmans Green.
Martínez-Torres, Martín, Beatriz Rubio-Morales, José Juan Piña-Amado, and Juana Luis. 2015. «Hemipenes in Females of the Mexican Viviparous Lizard Barisia imbricata (Squamata: Anguidae): An Example of Heterochrony in Sexual Development». Evolution & Development 17 (5): 270-77. https://doi.org/10.1111/ede.12134.
Mattelaer, Johan J. 2010. «The Phallus Tree: A Medieval and Renaissance Phenomenon». The Journal of Sexual Medicine 7 (2, part 1): 846-51. https://doi.org/10.1111/j.1743–6109.2009.01668.x.
Mattinson, Chris, ed. 2008. Firefly Encyclopedia of Reptiles and Amphibians. 2nd ed. Buffalo: Brown Reference Group.
Matzke-Karasz, Renate, John V. Neil, Robin J. Smith, Radka Symonová, Libor Morkovsky, Michael Archer, Suzanne J. Hand, Peter Cloetens, and Paul Tafforeau. 2014. «Subcellular Preservation in Giant Ostracod Sperm from an Early Miocene Cave Deposit in Australia». Proceedings of the Royal Society B: Biological Sciences 281 (1786): 20140394. https://doi.org/10.1098/rspb.2014.0394.
Mautz, Brian, Bob B. M. Wong, Richard A. Peters, and Michael D. Jennions. 2013. «Penis Size Interacts with Body Shape and Height to Influence Male Attractiveness». Proceedings of the National Academy of Sciences of the United States of America 110 (17): 6925-30. https://doi.org/10.1073/pnas.1219361110.
McIntyre, J. K. 1996. «Investigations into the Relative Abundance and Anatomy of Intersexual Pigs (Sus sp.) in the Republic of Vanuatu». Science in Nero Guinea 22 (3): 137-51.
McLean, Cory Y., Philip L. Reno, Alex A. Pollen, Abraham I. Bassan, Terence D. Capellini, Catherine Guenther, Vahan B. Indjeian, et al. 2011. «Human-Specific Loss of Regulatory DNA and the Evolution of Human-Specific Traits». Nature 471: 216-19. https://doi.org/10.1038/nature09774.
Menand, Louis. 2002. «What Comes Naturally». The New Yorker, November 18, 2002. https://www.newyorker.com/magazine/2002/11/25/what-comes-naturally-2.
Miller, Edward H., and Lauren E. Burton. 2001. «It's All Relative: Allometry and Variation in the Baculum (Os Penis) of the Harp Seal, Pagophilus groen-landicus (Carnivora: Phocidae)». Biological Fournal of the Linnean Society 72 (3):345-55. https://doi.org/10.1006/bij1.2000.0509.
_____, Ian L. Jones, and Garry B. Stenson. 1999. «Baculum and Testes of the Hooded Seal (Cystophora cristata): Growth and Size-scaling and Their Relationships to Sexual Selection». Canadian Journal of Zoology 77 (3): 470-79. https://doi.org/10.1139/z98-233.
_____, Kenneth W. Pitcher, and Thomas R. Loughlin. 2000. «Bacular Size, Growth, and Allometry in the Largest Extant Otariid, the Steller Sea Lion (Eumetopias jubatus)». Journal of Mammalogy 81 (1): 134-44. https://doi.org/10.1644/1545-1542(2000)081 <0134BSGAAI>2.0.CO;2.
Miller, Geoffrey P., Joshua M. Tybur, and Brent D. Jordan. 2007. «Ovulatory Cycle Effects on Tip Earnings by Lap Dancers: Economic Evidence for Hu man Estrus?» Evolution and Human Behavior 28 (6): 375-81. https://doi.org/10.1016/j.evolhumbehav.2007.06.002.
Miller, Joshua Rhett. 2019. «Husband Hacks Off Alleged Rapist's Penis After Seeing Him Assault Wife». New York Post, October 17,2019. https://nypost.com/2019/10/17/husband-hacks-off-alleged-rapists-penis-after-seeing-him-assault-wife.
Monk, Julia D., Erin Giglio, Ambika Kamath, Max R. Lambert, and Caitlin E. McDonough. 2019. «An Alternative Hypothesis for the Evolution of Same-Sex Sexual Behaviour in Animals». Nature Ecology & Evolution 3: 1622-31. https://doi.org/10.1038/41559-019-1019-7.
Moreno Soldevila, Rosario, Alberto Marina Castillo, and Juan Fernández Val-verde. 2019. A Prosopography to Martial's Epigrams. Boston: De Gruyter.
Museum für Naturkunde, Berlin. «A Penis in Amber». 2019. https://www.museumfuernaturkunde.berlin/en/pressemitteilungen/penis-amber.
Myers, Charles W. 1974. «The Systematics of Rhadinaea (Colubridae), a Genus of New World Snakes». Bulletin of the American Museum of Natural History 153 (1). http://digitallibrary.amnh.org/handle/2246/605.
Nadler, Ronald D. 2008. «Primate Menstrual Cycle». Primate Info Net, National Primate Center, University of Wisconsin, September 11, 2008. http://pin.primate.wisc.edu/aboutp/anat/menstrual.html.
Naylor, R., S. J. Richardson, and B. M. McAllan. 2007. «Boom and Bust: A Review of the Physiology of the Marsupial Genus Antechinus». Journal of Comparative Physiology B 178: 545-62. https://doi.org/10.1007/00360-007-0250-8.
Newitz, Annalee. 2014. «Your Penis Is Getting in the Way of My Science». Gizmod, April 17,2014. https://io9.gizmodo.com/your-penis-is-getting-in-the-way-of-my-science-1564473352.
Norman, Jeremy. n.d. «Jacob Christoph Le Blon Invents the Three-Color Process of Color Printing». HistoryofInformation.com. Accessed January 31, 2020. http://www.historyofinformation.com/detail.php?id=405
Oswald, Flora, Alex Lopes, Kaylee Skoda, Cassandra L. Hesse, and Cory L. Pedersen. 2019. «I'll Show You Mine So You'll Show Me Yours: Motivations and Personality Variables in Photographic Exhibitionism». The Fournal of Sex Research July 18, 2019. https://doi.org/10.1080/00224499.2019.1639036.
Orbach, Dara N., Brandon Hedrick, Bernd Würsig, Sarah L. Mesnick, and Patricia L. R. Brennan. 2018. «The Evolution of Genital Shape Variation in Female Cetaceans». Evolution 72 (2): 261-73. https://doi.org/10.1111/evo.13395.
_____, Diane A. Kelly, Mauricio Solano, and Patricia L. R. Brennan. 2017. «Gen-ital Interactions During Simulated Copulation Among Marine Mammals». Proceedings of the Royal Society B: Biological Sciences 284 (1864): 20171265. https://doi.org/10.1098/rspb.2017.1265.
_____, Shilpa Rattan, Mél Hogan, Alfred J. Crosby, and Patricia L. R. Brennan. 2019. «Biomechanical Properties of Female Dolphin Reproductive Tissue». Acta Biomaterialia 86: 117-24. https://doi.org/10.1016/j.actbio.2019.01.012.
Panashchuk, Roksana. 2019. «Husband Cuts Off Rapist's Penis After Seeing His Own Wife Being Sexually Assaulted Near Their Home in Ukraine-and Now Faces a Longer Sentence than Her Attacker». Daily Mail Online. October 17, 2019. https://www.dailymail.co.uk/news/article-7583121/Husband-cuts-rapists-penis-seeing-wife-assaulted-near-home-Ukraine.html.
Patlar, Bahar, Michael Weber, Tim Temizyürek, and Steven A. Ramm. 2019. «Seminal Fluid-Mediated Manipulation of Post-mating Behavior in a Simultaneous Hermaphrodite». Current Biology 30 (1): 143-49.4. https://doiorg/10.1016/j.cub.2019.11.018.
Pearce, Fred. 2000. «Inventing Africa». New Scientist, August 12, 2000. https://www.newscientist.com/article/mg16722514-300-inventing-africa.
Pedreira, D. A. L., A. Yamasaki, and C. E. Czeresnia. 2001. «Fetal Phallus 'Erection' Interfering with the Sonographic Determination of Fetal Gender in the First Trimester». Ultrasound in Obstetrics & Gynecology 18 (4): 402-04. https://doi.org/10.1046/j.0960–7692.2001.00532.x.
Peterson, Jordan B. 2018. 12 Rules for Life: An Antidote to Chaos. Toronto: Random House Canada.
Phelpstead, Carl. 2007. «Size Matters: Penile Problems in Sagas of Icelanders». Exemplaria 19 (3): 420-37. https://doi.org/10.1179/175330707×237230.
Plutarch. 1924. «The Roman Questions of Plutarch: A
