@article{DA_2003_10_3_a3,
     author = {V. P. Il'ev and A. S. Televnin},
     title = {Two problems on hereditary systems},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {54--66},
     publisher = {mathdoc},
     volume = {10},
     number = {3},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2003_10_3_a3/}
}