Dewan, I., S. M. A. Islam, S. I. Khandaker, W. Nasreen, and O. Hoque. “In Vitro and Ex Vivo Studies of Nonionic Surfactant Vesicles Using 23 Factorial Design: Metoprolol Tartrate Used As Model Drug”. Modern Advances in Pharmaceutical Research Vol. 2, Oct. 2019, pp. 49-68, https://stm1.bookpi.org/index.php/mapr-v2/article/view/534.