R. A. Boakes, “The Impact of Pavlov on the Psychology of Learning in English-Speaking Countries”, Span. j. psychol., vol. 6, no. 2, pp. 93–98, Jan. 2003, Accessed: Nov. 18, 2024. Available: https://revistas.ucm.es/index.php/SJOP/article/view/SJOP0303220093A