Amin, M. M., E. Effendy, F. L. Sianturi, M. Saragih, and S. Nasution. “Case Report: Trance in Mental Retardation”. Open Access Macedonian Journal of Medical Sciences, vol. 9, no. T3, May 2021, pp. 31-34, doi:10.3889/oamjms.2021.6323.