Atakhan N., Dauylbayev M.K., & Asset N. (2021). ASYMPTOTIC EXPANSION OF SOLUTION OF BVP WITH INITIAL JUMPS FOR SINGULARLY PERTURBED INTEGRO-DIFFERENTIAL EQUATION. Известия НАН РК. Серия физико-математическая, (4), 126–135. извлечено от http://189185.vm7pq.group/physics-mathematics/article/view/1937