@article{UZERU_1989_2_a1,
     author = {S. K. Afyan},
     title = {Ordinary differential equation system of non-canonical shape. {I}},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {10--15},
     publisher = {mathdoc},
     number = {2},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZERU_1989_2_a1/}
}