@article{DAN_1997_354_2_a2,
     author = {A. I. Kibzun and G. L. Tret'yakov},
     title = {Differentiability of the probability function},
     journal = {Doklady Akademii Nauk},
     pages = {159--161},
     publisher = {mathdoc},
     volume = {354},
     number = {2},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1997_354_2_a2/}
}