@article{SM_1988_61_1_a1,
     author = {A. S. Kalashnikov},
     title = {On some nonlinear systems describing the dynamics of competing biological species},
     journal = {Sbornik. Mathematics},
     pages = {9--22},
     year = {1988},
     volume = {61},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1988_61_1_a1/}
}