Damas Mora JM, Jenner FA, Eacott SE (1980). "On heautoscopy or the phenomenon of the double: Case presentation and review of the literature". Br J Med Psychol (به انگلیسی). 53 (1): 75–83. doi:10.1111/j.2044-8341.1980.tb02871.x. PMID6989391.
Damas Mora JM, Jenner FA, Eacott SE (1980). "On heautoscopy or the phenomenon of the double: Case presentation and review of the literature". Br J Med Psychol (به انگلیسی). 53 (1): 75–83. doi:10.1111/j.2044-8341.1980.tb02871.x. PMID6989391.