Samusenko P, Vira M. Asymptotic solutions of boundary value problem for singularly perturbed system of differential-algebraic equations. Carpathian Math. Publ. [Internet]. 2022 Apr. 25 [cited 2024 Nov. 24];14(1):49-60. Available from: https://vps.pnu.edu.ua/index.php/cmp/article/view/4685