Bartoszewski Z, Baranowska A. Solving Boundary Value Problems for Second Order Singularly Perturbed Delay Differential Equations by ε-Approximate Fixed-Point Method. MMA [Internet]. 2015Jun.2 [cited 2024Nov.18];20(3):369-81. Available from: https://jeelm.vgtu.lt/index.php/MMA/article/view/1007