@article{MO_2022_4_a2,
     author = {M. A. Gorelov},
     title = {Derivative and monotonicity},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {16--25},
     year = {2022},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2022_4_a2/}
}