@article{ISU_2009_9_3_a13,
     author = {A. A. Khromov},
     title = {Approximating properties of the powers of the differentiation operator resolvent},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {75--78},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2009_9_3_a13/}
}