James Rowland Angell (1906). "The Important Human Instincts", Chapter 16 in Psychology: An Introductory Study of the Structure and Function of Human Consciousness, third edition, revised. New York: Henry Holt and Company. https://brocku.ca/MeadProject/Angell/Angell_1906/Angell_1906_p.html
Bornstein, Marc H.;Putnick, Diane L.;Rigo, Paola;Esposito, Gianluca;Swain, James E.Proceedings of the National Academy of Sciences,114,45,2017,p.E9465–E9473. DOI: 10.1073/pnas.1712022114. PMC: 5692572. PMID: 29078366[Consulta: free].
Gettler, L. T.;McDade, T. W.;Feranil, A. B.;Kuzawa, C. W.Proceedings of the National Academy of Sciences,108,39,2011,p.16194–16199. DOI: 10.1073/pnas.1105403108. PMC: 3182719. PMID: 21911391[Consulta: free].
Kim, Young-Joon;Žitňan, Dušan;Galizia, C. Giovanni;Cho, Kook-Ho;Adams, Michael E.Current Biology,16,14,2006,p.1395–1407. DOI: 10.1016/j.cub.2006.06.027. PMID: 16860738[Consulta: free].
Bornstein, Marc H.;Putnick, Diane L.;Rigo, Paola;Esposito, Gianluca;Swain, James E.Proceedings of the National Academy of Sciences,114,45,2017,p.E9465–E9473. DOI: 10.1073/pnas.1712022114. PMC: 5692572. PMID: 29078366[Consulta: free].
Gettler, L. T.;McDade, T. W.;Feranil, A. B.;Kuzawa, C. W.Proceedings of the National Academy of Sciences,108,39,2011,p.16194–16199. DOI: 10.1073/pnas.1105403108. PMC: 3182719. PMID: 21911391[Consulta: free].
Kim, Young-Joon;Žitňan, Dušan;Galizia, C. Giovanni;Cho, Kook-Ho;Adams, Michael E.Current Biology,16,14,2006,p.1395–1407. DOI: 10.1016/j.cub.2006.06.027. PMID: 16860738[Consulta: free].