@article{MZM_1974_15_3_a14,
     author = {L. P. Kuptsov},
     title = {Mean value theorem and a~maximum principle for {Kolmogorov's} equation},
     journal = {Matemati\v{c}eskie zametki},
     pages = {479--489},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_15_3_a14/}
}