P. T. D’Orban & C. Howard, “Violence in Sleep: Medico-Legal Issues and Two Case Reports”, Psychological Medicine 17, № 4 (1987): 915–25; B. Boeve, E. Olson & M. Silber, “Rapid Eye Movement Sleep Behavior Disorder: Demographic, Clinical, and Laboratory Findings in 93 Cases”, Brain 123, № 2 (2000): 331–39.