@article{VSGU_2011_5_a8,
     author = {V. A. Sobolev and D. M. Shchepakin},
     title = {Integral manifolds and the reduction principle},
     journal = {Vestnik Samarskogo universiteta. Estestvennonau\v{c}na\^a seri\^a},
     pages = {81--92},
     year = {2011},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGU_2011_5_a8/}
}