A comparison of drug-seeking behavior maintained by d-amphetamine, l-deprenyl (selegiline), and d-deprenyl under a second-order schedule in squirrel monkeys - Sevil Yasar; József Gaál; Leigh V. Panlilio; Zuzana Justinova; Szecsö V. Molnár; Godfrey H. Redhi; Charles W. Schindler (Psychopharmacology, 2006)