Atakhan N., Dauylbayev M.K., & Asset N. (2021). ASYMPTOTIC EXPANSION OF SOLUTION OF BVP WITH INITIAL JUMPS FOR SINGULARLY PERTURBED INTEGRO-DIFFERENTIAL EQUATION. Academic Scientific Journal of Computer Science, (4), 126–135. извлечено от http://89.250.84.46/physics-mathematics/article/view/1937