@article{DAN_1987_293_6_a20,
     author = {S. M. Churilov and I. G. Shuhman},
     title = {A nonlinear perturbation theory for weakly supercritical stratified
},
     journal = {Doklady Akademii Nauk},
     pages = {1372--1378},
     publisher = {mathdoc},
     volume = {293},
     number = {6},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_293_6_a20/}
}