Espinosa Romero, C. I., & Jiménez Espinosa, A. (2014). Construction of the concept of ratio and constant ratio from the social epistemological viewpoint. Universidad Pedagógica y Tecnológica de Colombia.
Lua i Stíl Chicago (17ú heag.)Espinosa Romero, César Iván, agus Alfonso Jiménez Espinosa. Construction of the Concept of Ratio and Constant Ratio from the Social Epistemological Viewpoint. Universidad Pedagógica y Tecnológica de Colombia, 2014.
Lua MLA (9ú heag.)Espinosa Romero, César Iván, agus Alfonso Jiménez Espinosa. Construction of the Concept of Ratio and Constant Ratio from the Social Epistemological Viewpoint. Universidad Pedagógica y Tecnológica de Colombia, 2014.
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