@article{DAN_1987_293_3_a8,
     author = {A. F. Voloshin},
     title = {A method for localization of the optimum region in problems of},
     journal = {Doklady Akademii Nauk},
     pages = {549--553},
     publisher = {mathdoc},
     volume = {293},
     number = {3},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_293_3_a8/}
}