@article{TSP_2007_26_26_a6,
     author = {B. Grec and E. V. Radkevich},
     title = {Newton's polygon method and the local solvability of free boundary problems},
     journal = {Trudy Seminara im. I.G. Petrovskogo},
     pages = {116--178},
     publisher = {mathdoc},
     volume = {26},
     number = {26},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TSP_2007_26_26_a6/}
}