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@article{GMJ_1995__2_3_47272, author = {Bartu\v{s}ek, Miroslav}, title = {On structure of solutions of a system of four differential inequalities.}, journal = {Georgian Mathematical Journal}, pages = {225--236}, publisher = {mathdoc}, volume = {2}, number = {3}, year = {1995}, zbl = {0824.34014}, language = {en}, url = {http://geodesic.mathdoc.fr/item/GMJ_1995__2_3_47272/} }
Bartušek, Miroslav. On structure of solutions of a system of four differential inequalities.. Georgian Mathematical Journal, Tome 2 (1995) no. 3, pp. 225-236. http://geodesic.mathdoc.fr/item/GMJ_1995__2_3_47272/