14. Langford, D.J.; Crager, S.E.; Shehzad, Z.; Smith, S.B.; Sotocinal, S.G.; Levenstadt, J.S.; Mogil, J.S. (2006). “Social modulation of pain as evidence for empathy in mice”. Science(Submitted manuscript). 312 (5782): 1967–1970.
15. Langford, D.J.; Crager, S.E.; Shehzad, Z.; Smith, S.B.; Sotocinal, S.G.; Levenstadt, J.S.; Mogil, J.S. (2006). “Social modulation of pain as evidence for empathy in mice”. Science(Submitted manuscript). 312 (5782): 1967–1970. Bibcode:2006Sci…312.1967L. doi:10.1126/science.1128322. PMID 16809545. S2CID 26027821.)
16. Smith, A.V., Proops, L., Grounds, K., Wathan, J. and McComb, K. (2016). “Functionally relevant responses to human facial expressions of emotion in the domestic horse (Equus caballus)”. Biology Letters. 12 (2): 20150907. doi:10.1098/rsbl.2015.0907. PMC 4780548. PMID 26864784.
17. Wechkin, S.; Masserman, J.H.; Terris, W. (1964). “Shock to a conspecific as an aversive stimulus”. Psychonomic Science. 1(1–12): 47–48. doi:10.3758/bf03342783.^
18. Masserman, J.; Wechkin, M.S.; Terris, W. (1964). “Altruistic behavior in rhesus monkeys”. American Journal of Psychiatry. 121 (6): 584–585. CiteSeerX 10.1.1.691.4969. doi:10.1176/ajp.121.6.584. PMID 14239459.
19. Nick Bos, Liselotte Sundström, Siiri Fuchs, Dalial Freitak. “Ants medicate to fight disease” Evolution Volume 69, Issue 11, pages 2979–2984, November 2015
20. News Feature: Animals that self-medicate Proc Natl Acad Sci U S A. 2014 Dec 9; 111(49): 17339–17341.Published online 2014 Dec 9. doi: 10.1073/pnas.1419966111PMCID: PMC4267359PMID: 25492915
21. Grandmothering, menopause, and the evolution of human life histories, Proc Natl Acad Sci U S A. 1998 Feb 3; 95(3): 1336–1339.doi: 10.1073/pnas.95.3.1336PMCID: PMC18762 PMID: 9448332 Anthropology
22. 14,DOI: 10.1002/evan.21763 Paleomedicine and the use of plant secondary compounds in the Paleolithic and Early Neolithic
23. Bigger, J. W., Boland, C. R., & O’meara, R. A. Q. (1927). Variant colonies of Staphylococcus aureus. The Journal of Pathology and Bacteriology, 30(2), 261–269. doi:10.1002/path.1700300204
24. Shama, G. (2016). La Moisissure et la Bactérie: Deconstructing the fable of the discovery of penicillin by Ernest Duchesne. Endeavour, 40(3), 188–200. doi:10.1016/j.endeavour.2016.07.005
25. Vrieze, Jop de (2015-08-14). “The littlest farmhands”. Science. 349 (6249): 680–683. Bibcode:2015Sci…349..680D. doi:10.1126/science.349.6249.680. ISSN 0036–8075. PMID 26273035.