1.
Sobkovich R, Kazmerchuk A. Solvability of $n$-point problems with parameter for system of differential equation. Carpathian Math. Publ. [Internet]. 2010Dec.30 [cited 2023Dec.5];2(2):116-22. Available from: https://journals.pnu.edu.ua/index.php/cmp/article/view/3973