Perpere Viñuales, Alvaro. 2020. “Pierre De Jean Olivi (2017). Treaty of Contracts. Preliminary Study of Rafael Ramis Barceló. Translation and Notes by Pedro Ramis Serra and Rafael Ramis Barceló”. Cultura Económica 38 (99):77-79. http://200.16.86.39/index.php/CECON/article/view/3097.