1. Placebo effects in medicine, psychotherapy, and psychoanalysis;Shapiro,1971
2. What makes the placebo work?;Lowinger;Arch Gen Psychiatry,1969
3. An analysis of experimental components in a placebo effect;Buckaiew;Psychol Rec,1972
4. Further studies on the “pharmacology” of placebo administration;Lasagna;J Clin Invest,1958
5. Placebo pharmacology;Merin;Anesth Prog,1973