“Factors Affecting the Digestibility, Absorption and Retention of Calcium, Oxalate, Ethylen-Diamine-Tetracetic Acid (disodium salt), Nitril Triacetic Acid, Lysine and Protein Quality”. Revista Española de Fisiología 28, no. 2 (June 1, 1972): 115–123. Accessed July 7, 2025. https://revistas.unav.edu/index.php/ref/article/view/49312.