@article{DM_1991_3_3_a13,
     author = {E. G. Belousov and V. G. Andronov},
     title = {Ravines of functions and absolutely nonuniform sets and functions},
     journal = {Diskretnaya Matematika},
     pages = {147--158},
     publisher = {mathdoc},
     volume = {3},
     number = {3},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1991_3_3_a13/}
}