Zhalukevich DS. Equivalence transformations of families of se­cond-order quasi-linear hyperbolic equations of a two-variable function. Журнал Белорусского государственного университета. Математика. Информатика. 2026;(2):28-38. Accessed November 11, 2026. https://journals.bsu.by/index.php/mathematics/article/view/7305