@article{SM_1972_16_4_a2,
     author = {A. I. Vol'pert and S. I. Khudyaev},
     title = {On the {Cauchy} problem for composite systems of nonlinear differential equations},
     journal = {Sbornik. Mathematics},
     pages = {517--544},
     publisher = {mathdoc},
     volume = {16},
     number = {4},
     year = {1972},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1972_16_4_a2/}
}