Sahu, L.K., J.K. Gupta, S. Si, and S.K. Patro. 2016. “Concurrent Spectrophotometric Assay of Pseudoephedrine and Cetrizine from Combination Tablets”. Asian Journal of Chemistry 16 (2):1149-52. https://asianpubs.org/index.php/ajchem/article/view/14571.