R. K. Shukla and N. V. A. Rao, “Immunohistochemistry as an important tool for exploring the insights of various aspects of gastro-intestinal tract”, T. Appl. Biol. Chem. J., vol. 1, no. 2, pp. 72–82, Dec. 2020, doi: 10.52679/tabcj.2020.0009.