@article{DAN_1990_315_5_a2,
     author = {P. A. Kirichuk},
     title = {An operator-valued function of {Mittag-Leffler} type and a},
     journal = {Doklady Akademii Nauk},
     pages = {1039--1044},
     year = {1990},
     volume = {315},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_315_5_a2/}
}