@article{BGUMI_2021_2_a2,
     author = {V. A. Pavlovsky and I. L. Vasiliev},
     title = {On properties of h-differentiable functions},
     journal = {Journal of the Belarusian State University. Mathematics and Informatics},
     pages = {29--37},
     publisher = {mathdoc},
     volume = {2},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/BGUMI_2021_2_a2/}
}