1.
Sobkovich R, Kazmerchuk A. Construction on the Green function for Vallee-Poussin problem for nonlinear system of differential equations. Carpathian Math. Publ. [Internet]. 2013 Jun. 20 [cited 2024 Nov. 21];5(1):121-8. Available from: https://journals.pnu.edu.ua/index.php/cmp/article/view/3660