(en) Anne M. Valk, Radical Sisters: Second-wave Feminism and Black Liberation in Washington, D.C., University of Illinois Press, (lire en ligne), p. 141-154, 216-218
Sudden Death, Rita Mae Brown, New York, Bantam, 1983, p. 68 ; on peut en trouver confirmation dans The Ultimate Quotable Einstein, Alice Calaprice, Princeton University Press, Princeton, 2011, 474
