1. Dipalma J. R. Bsic Pharmaccology in Medicines. McGraw Hill, New York 1976; 280–290
2. International Encyclopedia of Pharmacology and Therapeutics. Pergamon Press, New York 1973; Vol. 1: 127, sec.,74
3. Govoni, Hayes. Drug and Nursing Implications, 3rd. Ed. Appleton-Century Crafts, New York 1978; 124