TY - JOUR AU - K. I. Chernyshov TI - Tihonov's theorem for an equation with a Fredholm operator JO - Differencialʹnye uravneniâ PY - 1977 SP - 1625 EP - 1636 VL - 13 IS - 9 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1977_13_9_a8/ LA - ru ID - DE_1977_13_9_a8 ER -