TY - JOUR AU - N. M. Isakov TI - A set of discontinuity points of a~function that is essentially continuous JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1989 SP - 3 EP - 5 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1989_5_a0/ LA - ru ID - IVM_1989_5_a0 ER -