@article{TIMM_2020_26_2_a12,
     author = {L. F. Korkina and M. A. Rekant},
     title = {Some properties of power operator series},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {161--172},
     publisher = {mathdoc},
     volume = {26},
     number = {2},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2020_26_2_a12/}
}