“Sialic Acids. II. Relationship Between the Content of N-ACETYLNEURAMINIC Acid, HEXOSE and Total Proteins in Human Serum”. Revista Española de Fisiología 19, no. 4 (December 1, 1963): 163–167. Accessed July 8, 2025. https://revistas.unav.edu/index.php/ref/article/view/48983.