@article{MM_1996_8_4_a5,
     author = {Yu. M. Baryshnikov},
     title = {How many optimal variants can exist?},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {79--88},
     publisher = {mathdoc},
     volume = {8},
     number = {4},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1996_8_4_a5/}
}