Soares Filho, Paulo S. D., Álvaro J. M. Silva, Saulo M Velasco, Romariz S Barros, and Gerson Yukio Tomanari. “Assessing Symmetry by Comparing the Acquisition of Symmetric and Nonsymmetric Conditional Relations in a Capuchin Monkey”. International Journal of Psychological Research 9, no. 2 (July 1, 2016): 30–39. Accessed March 29, 2024. https://revistas.usb.edu.co/index.php/IJPR/article/view/2320.