@article{DE_1973_9_4_a13,
     author = {T. Tobias},
     title = {Optimal stopping of diffusion processes, and parabolic variational inequalities},
     journal = {Differencialʹnye uravneni\^a},
     pages = {702--708},
     publisher = {mathdoc},
     volume = {9},
     number = {4},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_4_a13/}
}