Benedetti, F.; Maggi, G.; et al. (2003). "Open versus hidden medical treatments: The patient's knowledge about a therapy affects the therapy outcome". Prevention & Treatment. 6 (1). doi:10.1037/1522-3736.6.1.61a.
learnreligions.com
Desy, Phylameana lila (9 May 2019). "learnreligions.com". Learn Religions. Retrieved 1 November 2022.