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@article{DE_1969_5_7_a12, author = {S. G. Krein and I. M. Kulikov}, title = {The {Maxwell-Leontovi{\v{c}}} operator}, journal = {Differencialʹnye uravneni\^a}, pages = {1275--1282}, publisher = {mathdoc}, volume = {5}, number = {7}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1969_5_7_a12/} }
S. G. Krein; I. M. Kulikov. The Maxwell-Leontovi{\v{c}} operator. Differencialʹnye uravneniâ, Tome 5 (1969) no. 7, pp. 1275-1282. http://geodesic.mathdoc.fr/item/DE_1969_5_7_a12/