@article{ZNSL_1977_73_a4,
     author = {L. N. Dovbysh and N. K. Nikol'skii and V. N. Sudakov},
     title = {How good can a nonhereditary family be?},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {52--69},
     publisher = {mathdoc},
     volume = {73},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1977_73_a4/}
}