@article{VTAMU_2023_28_141_a6,
     author = {V. I. Fomin},
     title = {About operator functions of an operator variable},
     journal = {Vestnik rossijskih universitetov. Matematika},
     pages = {68--89},
     publisher = {mathdoc},
     volume = {28},
     number = {141},
     year = {2023},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTAMU_2023_28_141_a6/}
}