@article{SM_1999_190_9_a1,
     author = {V. S. Belonosov},
     title = {Classical solutions of quasielliptic equations},
     journal = {Sbornik. Mathematics},
     pages = {1247--1265},
     publisher = {mathdoc},
     volume = {190},
     number = {9},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1999_190_9_a1/}
}