@article{FAA_2005_39_3_a5,
     author = {S. P. Chulkov},
     title = {On the {Convergence} of {Formal} {Solutions} of a {System} of {Partial} {Differential} {Equations}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {64--75},
     publisher = {mathdoc},
     volume = {39},
     number = {3},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2005_39_3_a5/}
}