@article{TIMM_2011_17_3_a18,
     author = {L. F. Korkina and M. A. Rekant},
     title = {Some classes of functions of a~linear closed operator},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {186--200},
     publisher = {mathdoc},
     volume = {17},
     number = {3},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2011_17_3_a18/}
}