Verheyden SL, Maidment R, Curran HV (2003). „Quitting ecstasy: an investigation of why people stop taking the drug and their subsequent mental health”. J. Psychopharmacol. (Oxford). 17 (4): 371—8. PMID14870948. doi:10.1177/0269881103174014.
Verheyden SL, Maidment R, Curran HV (2003). „Quitting ecstasy: an investigation of why people stop taking the drug and their subsequent mental health”. J. Psychopharmacol. (Oxford). 17 (4): 371—8. PMID14870948. doi:10.1177/0269881103174014.