TY - JOUR AU - A. G. Nikitin AU - A. P. Petrov TI - Passage to the limit with respect to a small parameter for the eigenvalues of a singularly perturbed Sturm--Liouville problem JO - Differencialʹnye uravneniâ PY - 1999 SP - 843 EP - 845 VL - 35 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1999_35_6_a19/ LA - ru ID - DE_1999_35_6_a19 ER -