@article{VMUMM_1993_2_a13,
     author = {M. V. Shamolin},
     title = {Application of the methods of {Poincar\'e} topographical systems and comparison systems in some concrete systems of differential equations},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {66--70},
     publisher = {mathdoc},
     number = {2},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1993_2_a13/}
}