K. P. Korupolu Prameela, T. S. Tata Santosh, and K. H. B. K. Harinadha Baba, “Development and Validation of a stability indicating method for the simultaneous determination of Atenolol and Hydrochlorothiazide by HPLC”, IJPDA, vol. 1, no. 1, pp. 49-60, Oct. 2013.