S. . Gupte, A. Bhagwat, and S. . Girishankar, “Effect of permeability of 6-carboxy fluorescein dye and the survival of probiotic bacteria Lactobacillus casei in acidic and gastric conditions”, J. BioSci. Biotechnol., vol. 10, no. 1, pp. 53–59, May 2021.