Askarova, R., K. Polyakov, and I. . Akulinina. “A Capillary Electrophoretic Method for the Analysis of Bupivacaine and Its Metabolites”. in Library, vol. 20, no. 2, June 2020, pp. 668-76, https://www.inlibrary.uz/index.php/archive/article/view/19666.