@article{MM_2003_15_9_a11,
     author = {O. V. Kokovikhina},
     title = {the answer of {O.} {V.~Kokovikhina} to {A.} {A.~Kustov}},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {127--128},
     year = {2003},
     volume = {15},
     number = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_2003_15_9_a11/}
}