TY - JOUR AU - N. K. Karapetyants AU - V. L. Ochirova TI - On a necessary condition for the convergence of averages at Lebesgue $p$-points of functions from $L_p$ JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1996 SP - 27 EP - 33 IS - 9 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1996_9_a4/ LA - ru ID - IVM_1996_9_a4 ER -