“Interest Rates on Credit Sales in Pamplona, a Usurious business*”. FACE: Revista de la Facultad de Ciencias Económicas y Empresariales 17, no. 2 (February 2, 2017): 120–129. Accessed October 16, 2025. https://ojs.unipamplona.edu.co/index.php/face/article/view/541.