@article{CHEB_2019_20_2_a22,
     author = {N. S. Polyakova},
     title = {Differentiation of functions of quaternionic variable},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {298--310},
     year = {2019},
     volume = {20},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2019_20_2_a22/}
}