D. Vamshidhar Reddy and Ambati Sambashiva Rao (2015) “Formulation and in-vitro evaluation of Tramadol HCl multi-particulate floating tablets”, World Journal of Pharmaceutical Sciences, 3(11), pp. 2226–2232. Available at: https://www.wjpsonline.com/index.php/wjps/article/view/formulation-tramadol-multi-particulate-floating-tablets (Accessed: 28 June 2025).