B.Jyothsna and V.Swapna (2017) “Method development and validation for the simultaneous estimation of ambroxol HCL and levofloxacin by using RP HPLC method”, International Journal of Pharmacy and Analytical Research, 6(4), pp. 717–732. doi: 10.61096/ijpar.v6.iss4.2017.717-732.