@article{DM_1995_7_4_a8,
     author = {E. G. Belousov and E. G. Andronov},
     title = {Ravines of functions and nonuniformity of their supergraphs},
     journal = {Diskretnaya Matematika},
     pages = {95--115},
     publisher = {mathdoc},
     volume = {7},
     number = {4},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1995_7_4_a8/}
}