Correlates of unprotected anal sex with casual partners: a study of gay men living in the southern United States
AIDS and Behavior (2006) - Comments
pubmed: 16715345  doi: 10.1007/s10461-006-9116-4  issn: 1090-7165  issn: 1573-3254 

David R. Holtgrave, Richard Crosby, R. Luke Shouse