@article{IVM_1996_9_a4,
     author = {N. K. Karapetyants and V. L. Ochirova},
     title = {On a necessary condition for the convergence of averages at {Lebesgue} $p$-points of functions from $L_p$},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {27--33},
     publisher = {mathdoc},
     number = {9},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1996_9_a4/}
}