Chakravarthi, K.S., and N. Devanna. “Simultaneous Estimation of Salbutamol, Oxtriphylline and Bromhexine Hydrochloride in Tablet Dosage Form by RP-HPLC”. Asian Journal of Chemistry, vol. 29, no. 7, May 2017, pp. 1629-34, doi:10.14233/ajchem.2017.20647.