Charles Mueller and Edward Donnerstein, "Film-facilitated Arousal and Prosocial Behavior," Journal of Experimental Social Psychology (1981), p. 31-41.

cited in:

Edward Donnerstein, Daniel Linz, and Steven Penrod, The Question of Pornography: Research Findings and Policy Implications (1987), The Free Press - A Division of MacMillan, Inc., Chap.3, p. 42-43.

F.M. Christensen, Pornography The Other Side (1990), Praeger Publishers, p. 135-137.