C. N. Bhimanadhuni, D. R. Garikapati, and P. Usha, “Development and validation of an RP-HPLC method for the simultaneous determination of Escitalopram Oxalate and Clonazepam in bulk and its pharmaceutical formulations”, Int Curr Pharm J, vol. 1, no. 8, pp. 193–198, Jul. 2012.