[B. N. Singh and K. H. Kim, Floating drug delivery systems: an approach to oral controlled drug delivery via gastric retention, J. Control. Rel. 63 (2000) 235-259.]Search in Google Scholar
[S. Arora, J. Ali, A. Ahuja, R. K. Khar and S. Baboota, Floating drug delivery systems: a review, AAPS PharmSciTech 6 (2005) 372-390.10.1208/pt060347]Search in Google Scholar
[R. Bomma, R. A. S. Naidu, M. R. Yamsani and K. Veerabrahma, Development and evaluation of gastroretentive norfloxacin floating tablets, Acta Pharm. 59 (2009) 211-221; DOI: 10.2478/v10007-009-0019-6.10.2478/v10007-009-0019-6]Search in Google Scholar
[S. T. Prajapati, L. D. Patel and D. M. Patel, Gastric floating matrix tablets: Design and optimization using combination of polymers, Acta Pharm. 58 (2008) 221-229; DOI: 10.2478/v10007-008-0006-3.10.2478/v10007-008-0006-3]Search in Google Scholar
[S. K. Mishra and K. Pathak, Formulation and evaluation of oil entrapped gastroretentive floating gel beads of loratadine, Acta Pharm. 58 (2008) 187-197; DOI: 10.2478/v10007-008-0001-8.10.2478/v10007-008-0001-8]Search in Google Scholar
[J. G. Hardman, L. E. Limbird, A. G. Gilman (Eds.), Goodman and Gilman's: The Pharmacological Basis of Therapeutics, 10th ed., McGraw-Hill Publishers, New York 2001, pp. 255-256.]Search in Google Scholar
[M. J. Kendall, S. R. Maxwell, A. Sandberg and G. Westergren, Controlled release metoprolol. Clinical pharmacokinetic and therapeutic implications, Clin. Pharmacokin. 21 (1991) 319-330.10.2165/00003088-199121050-00001]Search in Google Scholar
[G. Jobin, A. Cortot, J. Godbillon, M. Duval, J. P. Schoeller, J. Hirtz and J. J. Bernier, Investigation of drug absorption from the gastrointestinal tract of man. I. Metoprolol in stomach, duodenum, and jejunum, Br. J. Clin. Pharmacol. 19 (1985) 97-105.10.1111/j.1365-2125.1985.tb02749.x]Search in Google Scholar
[C. Narendra, M. S. Srinath and G. Babu, Optimization of bilayer floating tablet containing metoprolol tartrate as a model drug for gastric retention, AAPS PharmSciTech. 7 (2006) 23-29; DOI: 10.1208/pt070234.10.1208/pt070234]Search in Google Scholar
[H. Ravishankar, P. Patil, A. Samel, H-U. Petereit, R. Lizio and J. Iyer-Chavan, Modulated release metoprolol succinate formulation based on ionic interactions: in-vivo proof of concept, J. Control. Rel. 111 (2006) 65-72.10.1016/j.jconrel.2005.12.007]Search in Google Scholar
[United States Pharmacopoeia 30, National Formulary 25, USP Convention, Rockville 2007, p. 2648.]Search in Google Scholar
[M. Rosa, H. Zia and T. Rhodes, Dosing and testing in-vitro of a bioadhesive and floating drug delivery system for oral application, Int. J. Pharm. 105 (1994) 65-70; DOI: 10.1016/0378-5173 (94) 90236-4.]Search in Google Scholar
[T. Higuchi, Rate of release of medicaments from ointment bases containing drugs in suspensions, J. Pharm. Sci. 50 (1961) 874-875.10.1002/jps.2600501018]Search in Google Scholar
[R. W. Korsmeyer, R. Gurny, E. Doelker, P. Buri and N. A. Peppas, Mechanisms of solute release from porous hydrophilic polymers, Int. J. Pharm. 15 (1983) 25-35; DOI: 10.1016/0378-5173(83)90064-9.10.1016/0378-5173(83)90064-9]Search in Google Scholar
[N. A. Peppas, Analysis of Fickian and non-Fickian drug release from polymers, Pharm. Acta Helv. 60 (1985) 110-111.]Search in Google Scholar