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@article{MV_1974_26_1_a25, author = {S. K. Ghosal and M. Chatterjee}, title = {On perturbation theory of a system of quasi-linear ordinary differential equations}, journal = {Matemati\v{c}ki vesnik}, pages = {185 }, publisher = {mathdoc}, volume = {26}, number = {1}, year = {1974}, url = {http://geodesic.mathdoc.fr/item/MV_1974_26_1_a25/} }
S. K. Ghosal; M. Chatterjee. On perturbation theory of a system of quasi-linear ordinary differential equations. Matematički vesnik, Tome 26 (1974) no. 1, p. 185 . http://geodesic.mathdoc.fr/item/MV_1974_26_1_a25/