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@article{ARM_1983__19_1_a2, author = {Shekhter, B. L.}, title = {On singular boundary value problems for two-dimensional differential systems}, journal = {Archivum mathematicum}, pages = {19--41}, publisher = {mathdoc}, volume = {19}, number = {1}, year = {1983}, mrnumber = {724306}, zbl = {0535.34010}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1983__19_1_a2/} }
Shekhter, B. L. On singular boundary value problems for two-dimensional differential systems. Archivum mathematicum, Tome 19 (1983) no. 1, pp. 19-41. http://geodesic.mathdoc.fr/item/ARM_1983__19_1_a2/