TY - JOUR AU - V. F. Butuzov AU - E. A. Derkunova TI - On a singularly perturbed system of first-order partial differential equations with various degrees of a small parameter JO - Differencialʹnye uravneniâ PY - 2006 SP - 775 EP - 789 VL - 42 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_2006_42_6_a6/ LA - ru ID - DE_2006_42_6_a6 ER -