@article{MZM_2011_90_6_a5,
     author = {N. N. Konechnaja},
     title = {Asymptotic {Integration} of {Symmetric} {Second-Order} {Quasidifferential} {Equations}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {875--884},
     publisher = {mathdoc},
     volume = {90},
     number = {6},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2011_90_6_a5/}
}