Chapem. Myslis nieco ako:
John O. G. Billy, Koray Tanfer, William R. Grady, and Daniel H. Klepinger (1993). The Sexual Behavior of Men in the United States. Family Planning Perspectives, 25, pp. 52-60.
alebo
Robert E. Fay, Charles F. Turner, Albert D. Klassen, and John H. Gagnon (1989). Prevalence and Patterns of Same-Gender Sexual Contact among Men. Science, 243, pp. 338-348
alebo
Diane Binson et. al. (1995). Prevalence and Social Distribution of Men Who Have Sex with Men: United States and Its Urban Centers. The Journal of Sex Research, 32, pp. 245-254
k comu som sa preklikal hned cez 3 odkaz na googli. Asi mas iny google.
