Effects of d-amphetamine and MK-801 on impulsive choice: Modulation by schedule of reinforcement and delay length. - Yates, Justin R.; Day, Haley A.; Evans, Karson E.; Igwe, Hephzibah O.; Kappesser, Joy L.; Miller, Amber L.; Murray, Christopher P.; Torline, Brett T.; Ellis, Alexis L.; Stacy, William L. (Behavioural Brain Research, 2019)