Féré, L'Instinct sexuel, p. 213.
C. F. von Schlichtegroll, Sacher-Masoch und der Masochismus, p. 31.
Archivio di Psichiatria, vol. xv, p. 120. Mention may also be made of the cases (described as hysterical mixoscopia by Kiernan, Alienist and Neurologist, May, 1903) in which young women address to themselves anonymous letters of an abusive and disgusting character, and show them to others.