Martin JR, Godel T, Hunkeler W, Jenck F, Moreau JL, Sleight AJ, Widmer U (December 2000). "Psychopharmacological agents.". Kirk-Othmer Encyclopedia of Chemical Technology. doi:10.1002/0471238961.1619250313011820.a01. ISBN 0471238961. 0471238961 ↩
Vander Brook MJ, Cartland GF (1944). "A Pharmacologic Study of 5-Allyl-5-Cyclopentenyl Barbituric Acid (Cyclopal)". Journal of Pharmacology and Experimental Therapeutics. 80 (2): 119–125. CiteSeerX 10.1.1.983.6071. /wiki/CiteSeerX_(identifier) ↩