Volodymyr P'yatokha

Universal sex differences in the desire for sexual variety: tests from 52 nations, 6 continents, and 13 islands.

Karolien Poels, Martin Voracek, Bert Timmermans, 2003, Journal of personality and social psychology.

Transgender and Transsexuality

T. Witten, M. Landén, R. Ekins, 2003 .

and of Other Pancultural Constructs? Patterns and Universals of Adult Romantic Attachment Across 62 Cultural Regions : Are Models of Self

Allen I. Huffcutt, K. Grammer, P. Shaver, 2011 .

Patterns and Universals of Adult Romantic Attachment Across 62 Cultural Regions

Allen I. Huffcutt, K. Grammer, P. Shaver, 2004 .