M. S. Islam, T. Haque, R. Jahangir, K. Fatema, M. I. Vhuiyan, and I. J. Biva, “In Vitro Release Kinetic Study of Ciprofloxacin HCl from Methocel K15M CR, Methocel K4M CR and Methocel K4M Premium Matrix Tablets”, S.J. Pharm. Sci, vol. 2, no. 1, pp. 37–43, Aug. 2010.