N. Murali Krishna, S. Srinivasa Rao and C. Rambabu (2017) “Bromothymol blue and Bromocresol purple as efficient reagents for the development and validation of visible spectrophotometric assay methods for Felodipine ”, International Journal of Pharmaceutics and Drug Analysis, 5(4), pp. 108-115. Available at: https://ijpda.org/index.php/journal/article/view/276 (Accessed: 31August2026).