M. Nag, Paul, R. Kumar, Biswas, S. , Dasgupta, D. , Roy, D. , Bhattacharjee, P. , Chattopadhyay, S. , and Mallick, A. ,
“A Review on Application of Natural Indicators in Acid-base Titration”,
Pharmacognosy Reviews, vol. 17, no. 34, pp. 308-319, 2023.