TY - RPRT TI - Caffeine elevates reinforcement threshold for electrical brain stimulation: tolerance and withdrawal changes. AU - G K Mumford AU - D B Neill AU - S G Holtzman PY - 1988 DO - 10.1016/0006-8993(88)90298-3 UR - https://pubmed.ncbi.nlm.nih.gov/3167574/ ID - 3167574 ER -