@article{DAN_1993_331_2_a0,
     author = {K. A. Abgaryan},
     title = {An asymptotic transformation of the equations of a nonstationary},
     journal = {Doklady Akademii Nauk},
     pages = {133--136},
     publisher = {mathdoc},
     volume = {331},
     number = {2},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1993_331_2_a0/}
}