作者: K. Schulze , M. Dadmarz , W.H. Vogel
DOI: 10.1159/000056159
关键词: Male rats 、 Self-administration 、 Polydrug use 、 Morphine 、 Medicine 、 Anesthesia
摘要: Voluntary self-administration of cocaine and/or morphine was studied in rats. Male rats were offered water bottles or containing either morphine, both and (combinat