Myronyk V, Mykhaylyuk V. First-order linear partial differential equations in the class of separately differentiable functions. Carpathian Math. Publ. [Internet]. 2013 Jun. 20 [cited 2024 Nov. 27];5(1):89-93. Available from: https://vps.pnu.edu.ua/index.php/cmp/article/view/3655