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@article{MMO_1990_53_a2, author = {M. M. Malamud}, title = {On transformation operators for ordinary differential equations}, journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva}, pages = {68--97}, publisher = {mathdoc}, volume = {53}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MMO_1990_53_a2/} }
M. M. Malamud. On transformation operators for ordinary differential equations. Trudy Moskovskogo matematičeskogo obŝestva, Trudy Moskovskogo Matematicheskogo Obshchestva, Tome 53 (1990), pp. 68-97. http://geodesic.mathdoc.fr/item/MMO_1990_53_a2/