Prasanna, L. C., H. R. Thomas, A. S. D’Souza, and K. M. Bhat. “The Histochemical Assessment of Sulpho-, Sialo-, and Neutral-Mucosubstances in Fetal Gastric Mucosa”. International Journal of Research in Medical Sciences, vol. 3, no. 1, Jan. 2017, pp. 235-8, https://www.msjonline.org/index.php/ijrms/article/view/1241.