@article{IVM_1959_6_a12,
     author = {Z. M. Lushnikova},
     title = {On the variation of the region of monotonicity},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {96--101},
     publisher = {mathdoc},
     number = {6},
     year = {1959},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1959_6_a12/}
}