Ramírez Ramos, Alberto. “Testing Oral D-Xylose Absorption As Test intestina.L Normal Values ​​in Our Environment and Literature Review”. Anales De La Facultad De Medicina, vol. 45, no. 1-2, June 1962, pp. 81-91, https://doi.org/10.15381/anales.v45i1-2.5973.