Méndez Pinto, Emilio. “The Tractatus to the Rescue of Principia Mathematica: Ramsey and the Logicist Foundations of Mathematics”. Crítica. Revista Hispanoamericana de Filosofía 54, no. 161 (June 21, 2022): 43–69. Accessed March 31, 2025. https://critica.filosoficas.unam.mx/index.php/critica/article/view/1346.