12. Botha-Brink, J. & Modesto, S. P. A mixed-age classed 'pelycosaur' aggregation from South Africa: earliest evidence of parental care in amniotes?
13. Jasinoski, S. C. & Abdala, F. Aggregations and parental care in the Early Triassic basal cynodonts Galesaurus planiceps and Thrinaxodon liorhinus.
14. Schmidt-Nielsen, K. & Randall, D. J.
15. Hopson, J. A. Endothermy, Small Size, and the Origin of Mammalian Reproduction.
16. Broad, K. D., Curley, J. P. & Keverne, E. B. Mother-infant bonding and the evolution of mammalian social relationships.
17. Chen, Z.
18. Attardo, G. M.
19. Keverne, E. Biology and Pathology of Trophoblast (2006).
20. Crockford, C., Deschner, T., Ziegler, T. E. & Wittig, R. M. Endogenous peripheral oxytocin measures can give insight into the dynamics of social relationships: a review.
21. Nagasawa, M.
22. Ogawa, S., Kudo, S., Kitsunai, Y. & Fukuchi, S. Increase in oxytocin secretion at ejaculation in male.
23. Carmichael, M. S.
24. Holt-Lunstad, J., Birmingham, W. A. & Light, K. C. Influence of a «warm touch» support enhancement intervention among married couples on ambulatory blood pressure, oxytocin, alpha amylase, and cortisol.
25. Grewen, K. M., Girdler, S. S., Amico, J. & Light, K. C. Effects of partner support on resting oxytocin, cortisol, norepinephrine, and blood pressure before and after warm partner contact.
26. Feldman, R. Oxytocin and social affiliation in humans.
27. Zak, P. J., Stanton, A. A. & Ahmadi, S. Oxytocin increases generosity in humans.
28. Kosfeld, M., Heinrichs, M., Zak, P. J., Fischbacher, U. & Fehr, E. Oxytocin increases trust in humans.
29. Domes, G., Heinrichs, M., Michel, A., Berger, C. & Herpertz, S. C. Oxytocin improves «mind-reading» in humans.
30. Guastella, A. J.
31. Guastella, A. J., Mitchell, P. B. & Dadds, M. R. Oxytocin increases gaze to the eye region of human faces.
32. Rosenzweig, M. R., Breedlove, S. M. & Watson, N. V.
33. Herculano-Houzel, S.
34. Herculano-Houzel, S. The human brain in numbers: a linearly scaled-up primate brain.
35. Herculano-Houzel, S. The remarkable, yet not extraordinary, human brain as a scaled-up primate brain and its associated cost.
36. Dunbar, R. I. & Shultz, S. Evolution in the social brain.