M. Trujillo, Humberto, Eugenia Oviedo-Joekes, y Cristina Vargas. 2006. «Compensatory and Mimetic Conditioned Responses to Effects of Heroin in Addicted Persons». Psicothema 18 (Número 1):59-65. https://reunido.uniovi.es/index.php/PST/article/view/8396.