Robles, Elías, Fernando Alucema, and José Cohen. “A cumulatíve Recorder for Two Types of Responses As Function of Time”. Mexican Journal of Behavior Analysis 7, no. 2 (June 21, 2011): 165–168. Accessed May 2, 2024. https://revistas.unam.mx/index.php/rmac/article/view/25745.