Alegre Zahonero, Luis, and Carlos Fernández Liria. “Truth and Law in the Thought of Kant and Marx. The Impossibility of Deducing Law from Scientific Laws”. Anales del Seminario de Historia de la Filosofía, vol. 29, no. 2, Nov. 2012, pp. 685-18, https://revistas.ucm.es/index.php/ASHF/article/view/40705.