@article{VMUMM_1998_4_a16,
     author = {V. A. Proshkin and Ya. V. Tatarinov},
     title = {Letter to the editors},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {73},
     year = {1998},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1998_4_a16/}
}