REMSCHMIDT, HELMUT; POLLER, MATHIAS; HERPETZ-DAHLMANN, BEATE; HENNIGHAUSEN, KLAUS; GUTENBRUNNER, CORNELIUS (2001). «A follow-up study of 45 patients with elective mutism». European Archives of Psychiatry and Clinical Neurosciences251 (6): 284-296. doi:10.1007/PL00007547.|fechaacceso= requiere |url= (ayuda)