@article{DAN_1978_242_3_a6,
     author = {L. P. Kuptsov},
     title = {The mean property and the maximum principle for parabolic equations of second order},
     journal = {Doklady Akademii Nauk},
     pages = {529--532},
     publisher = {mathdoc},
     volume = {242},
     number = {3},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_242_3_a6/}
}