@article{ZVMMF_1993_33_7_a1,
     author = {Yu. N. Subbotin},
     title = {Inheritance of monotonicity and convexity in local approximations},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {996--1003},
     publisher = {mathdoc},
     volume = {33},
     number = {7},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1993_33_7_a1/}
}