@article{TVP_1973_18_1_a14,
     author = {A. P. Korostelev},
     title = {A~probabilistic representation of the solution of the directional derivative problem},
     journal = {Teori\^a vero\^atnostej i ee primeneni\^a},
     pages = {172--176},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TVP_1973_18_1_a14/}
}