1. Diagnostic and statistical manual of mental disorders. 5th ed. Arlington, VA: American Psychiatric Association; 2013. p. 119–121.
2. Carroll B, Goforth H. Medical catatonia. In: Caroff S, Mann S, Francis A, Fricchione G, editors. Catatonia: from psychopathology to neurobiology. Washington, DC: American Psychiatric Publishing; 2004. p. 121–7.
3. Gelenberg AJ. The catatonic syndrome. Lancet. 1976;1:1339–41.
4. Ahuja N. Organic catatonia: a review. Indian J Psychiatry. 2000;42:327–46.
5. Denysenko L, Freudenreich O, Philbrick K, Penders T, Zimbrean P, Nejad S, et al. Catatonia in medically ill patients: an evidence-based medicine (EBM) monograph for psychosomatic medicine practice. The guidelines and evidence-based medicine Subcommittee of the Academy of psychosomatic medicine (APM) and the European Association of Psychosomatic Medicine (EAPM). 2015.
https://www.eapm.eu.com/wp-content/uploads/2018/06/Catatonia_APM-EAPM_2015-04-17.pdf
. Accessed 27 May 2018.