@article{DE_2001_37_3_a4,
     author = {I. S. Lomov},
     title = {The {Local} {Convergence} of {Biorthogonal} {Series} {Related} to {Differential} {Operators} with {Nonsmooth} {Coefficients:} {I}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {328--342},
     publisher = {mathdoc},
     volume = {37},
     number = {3},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2001_37_3_a4/}
}