@article{SM_1993_76_2_a11,
     author = {R. N. Ganikhodzhaev},
     title = {Quadratic stochastic operators, {Lyapunov} functions, and tournaments},
     journal = {Sbornik. Mathematics},
     pages = {489--506},
     year = {1993},
     volume = {76},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1993_76_2_a11/}
}