Garg, Rahul Kumar, and Singhvi Indrajeet. 2015. “Formulation Development and Optimization of Immediate Release Layer for Bilayer Gastroretentive Tablet of Nizatidine Using 32 Factorial Design Model”. Asian Journal of Pharmaceutical Research and Development 3 (2):58-66. https://ajprd.com/index.php/journal/article/view/241.