Feld, Scott L. (1991), Why your friends have more friends than you do, American Journal of Sociology, 96 (6): 1464—1477, doi:10.1086/229693, JSTOR2781907(англ.)
Feld, Scott L. (1991), Why your friends have more friends than you do, American Journal of Sociology, 96 (6): 1464—1477, doi:10.1086/229693, JSTOR2781907(англ.)