1. A quantitative analysis of the responding maintained by interval schedules of reinforcement;Catania;Journal of the Experimental Analysis of Behavior,1968
2. The theory of fixed-interval responding;Dews,1970
3. Schedules of reinforcement.;Ferster,1957
4. Scalar expectancy and Weber's law in animal timing;Gibbon;Psychological Review,1977
5. Higa, J.J., Wynne, C.D.L., & Staddon, J.E.R. (in press). Dynamics of time discrimination. Journal of Experimental Psychology: Animal Behavior Processes.