@article{IM2_1998_62_6_a3,
     author = {E. P. Dolzhenko and E. A. Sevast'yanov},
     title = {Approximations with a~sign-sensitive weight: existence and uniqueness theorems},
     journal = {Izvestiya. Mathematics },
     pages = {1127--1168},
     publisher = {mathdoc},
     volume = {62},
     number = {6},
     year = {1998},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1998_62_6_a3/}
}