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↑  Ford, Clellan S. (Clellan Stearns), 1909-1972., Patterns of sexual behavior, Westport, Conn.: Greenwood Press, 1980, ©1951
1 2 3 4  William F. Perrin, Bernd Würsig, J. G. M. Thewissen, Encyclopedia of Marine Mammals, Academic Press, 2009-02-26. (באנגלית)
↑  Nancy J. Granai, Troy L. Best, Tamias merriami, Mammalian Species, 1994-12-02, עמ' 1–9 doi: 10.2307/3504203
↑  Harold Burrows, Biological Actions of Sex Hormones, CUP Archive, 2003-03, עמ' 264. (באנגלית)
↑  R. F. Ewer, The Carnivores, Cornell University Press, 1998. (באנגלית)
↑  Paula Stockley, The Baculum, Current Biology 22
↑  A. Sharir, D. Israeli, J. Milgram, J. D. Currey, The canine baculum: The structure and mechanical properties of an unusual bone, Journal of Structural Biology 175, 2011-09-01, עמ' 451–456 doi: 10.1016/j.jsb.2011.06.006
1 2 3 4  ABC - Science - Beasts - Evidence - Programme 1 - Godinotia, web.archive.org, ‏2014-04-29
1 2  Walrus penis sells for $8,000 at Beverly Hills action, web.archive.org, ‏2007-11-06
↑  (PDF) Sexual Selection and Genital Evolution in Mammals: A Phylogenetic Analysis of Baculum Length, ResearchGate (באנגלית)
↑  Baculum length and copulatory behaviour in carnivores and pinnipeds (Grand Order Ferae) | A. F. Dixson | Request PDF, ResearchGate (באנגלית)
↑  (PDF) A positive relationship between baculum length and prolonged intromission patterns in mammals, ResearchGate (באנגלית)
↑  Are long penis bones an adaption to high latitude snowy environments? | Request PDF, ResearchGate (באנגלית)
↑  Wayback Machine, web.archive.org, ‏2017-04-05
↑  Paula Stockley, The baculum, Current Biology 22, 2012-12-18, עמ' R1032–R1033 doi: 10.1016/j.cub.2012.11.001
↑  Anna Nele Herdina, Diane A Kelly, Helena Jahelková, Peter H C Lina, Testing hypotheses of bat baculum function with 3D models derived from microCT, Journal of Anatomy 226, 2015-3, עמ' 229–235 doi: 10.1111/joa.12274
↑  Ahnlund, H., Age determination in the European badger, 1976, עמ' 119-125
↑  Abramov, Alexei V., Variation of the baculum structure of the Palaearctic badger, Russian Jornal of Theriology, 2002, עמ' 57-60
↑  Nova J. Silvy, The Wildlife Techniques Manual: Volume 1: Research. Volume 2: Management 2-vol. Set, JHU Press, 2012-03. (באנגלית)
↑  Ronald M. Nowak, Ernest Pillsbury Walker, Walker's Primates of the World, JHU Press, 1999-10-28. (באנגלית)
↑  How Did Man Lose His Penis Bone? | UCL Researchers in Museums, blogs.ucl.ac.uk
↑  John E. Harkness, Patricia V. Turner, Susan VandeWoude, Colette L. Wheler, Harkness and Wagner's Biology and Medicine of Rabbits and Rodents, Wiley, 2013-04-02. (באנגלית)
1 2  George A. Feldhamer, Lee C. Drickamer, Stephen H. Vessey, Joseph F. Merritt, Mammalogy: Adaptation, Diversity, Ecology, JHU Press, 2015-02-19. (באנגלית)
1 2  Matthew D. Dean, Teri Orr, Eric Abreu, Michael Lough-Stevens, The Baculum was Gained and Lost Multiple Times during Mammalian Evolution, Integrative and Comparative Biology 56, 2016-10-01, עמ' 644–656 doi: 10.1093/icb/icw034
↑  R. F. Ewer, The Carnivores, Cornell University Press, 1998. (באנגלית)
↑  Richard Estes, The Behavior Guide to African Mammals: Including Hoofed Mammals, Carnivores, Primates, University of California Press, 1992. (באנגלית)
↑  (PDF) Is the bat os penis sexually selected? (vol 50, pg 450, 2001), ResearchGate (באנגלית)
↑  D. J. Hosken, A. G. Mcelligott, S. Lüpold, Bat genitalia: allometry, variation and good genes, Biological Journal of the Linnean Society 83, 2004-12-01, עמ' 497–507 doi: 10.1111/j.1095-8312.2004.00407.x
↑  Elizabeth G. Crichton, Philip H. Krutzsch, Reproductive Biology of Bats, Academic Press, 2000-06-12. (באנגלית)
↑  Ronald M. Nowak, Ernest Pillsbury Walker, Walker's Mammals of the World, JHU Press, 1999-07-29. (באנגלית)
1 2  Frederick S. Szalay, Evolutionary History of the Marsupials and an Analysis of Osteological Characters, Cambridge University Press, 2006-05-11. (באנגלית)
↑  Robert D. Martin, The evolution of human reproduction: A primatological perspective, American Journal of Physical Anthropology 134, 2007, עמ' 59–84 doi: 10.1002/ajpa.20734
↑  Friderun Ankel-Simons, Primate Anatomy: An Introduction, Elsevier, 2010-07-27. (באנגלית)
↑  Deba P. Sarma, Thomas G. Weilbaecher, Human os penis, Urology 35, 1990-04-01, עמ' 349–350 doi: 10.1016/0090-4295(90)80163-H
↑  Champion Richard H., Wegrzyn John, Congenital os Penis, Journal of Urology 91, 1964-06-01, עמ' 663–664 doi: 10.1016/S0022-5347(17)64197-1
↑  Scientists have answered one of the biggest questions people have about their penis, The Independent, ‏2016-12-14 (באנגלית)
↑  Dawkins, Richard, 1941-, The selfish gene, Thirtieth anniversary edition, Oxford: Oxford University Press, 2006
↑  Robert G. Bednarik, The Human Condition, 2011 doi: 10.1007/978-1-4419-9353-3
↑  Joanne O'Sullivan, Book of Superstitious Stuff: Weird Happenings, Wacky Rites, Frightening Fears, Mysterious Myths & Other Bizarre Beliefs, Charlesbridge, 2010-03-01. (באנגלית)
↑  Edward H. Miller, Encyclopedia of Marine Mammals (Second Edition), London: Academic Press, 2009-01-01, עמ' 68–71
↑  Scott F. Gilbert, Ziony Zevit, Congenital human baculum deficiency: The generative bone of Genesis 2:21–23, American Journal of Medical Genetics 101, 2001, עמ' 284–285 doi: 10.1002/ajmg.1387
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