Poonam Shinde, Sangeeta Parab, and A.V.Chitre. “STUDY THE PROTONATION POINT FOR NITROGLYCER-INE AND EFFECT OF NITROGLYCERINE ON ISOELECTRIC POINT OF VARIOUS AMINO ACIDS”. International Journal of Pharmaceutics and Drug Analysis, vol. 4, no. 4, Apr. 2016, pp. 208-11, https://www.ijpda.org/index.php/journal/article/view/216.