@article{DE_1977_13_4_a15,
     author = {A. T. Taldykin},
     title = {Systems of elements of a space over a space, and variational methods for the solution of equations with variable operators},
     journal = {Differencialʹnye uravneni\^a},
     pages = {724--732},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_4_a15/}
}