Regan, J; Sowman, R; Walsh, I (Apr 2006). “Prevalence of Dysphagia in acute and community mental health settings”. Dysphagia21 (2): 95-101. PMID16763936.
Craig, TJ (Nov 1980). “Medication use and deaths attributed to asphyxia among psychiatric patients”. Am J Psychiatry137 (11): 1366-1373. PMID7435669.