AGRAWAL, O.D., A.A. SHIRKHEDKAR, and S.J. SURANA. 2010. “Two UV-Spectrophotometric Methods for Simultaneous Determination of Levofloxacin and Ambroxol in Tablets”. Asian Journal of Chemistry 20 (3):1957-60. https://asianpubs.org/index.php/ajchem/article/view/19184.