@article{IIGUM_2012_5_1_a1,
     author = {A. A. Gavryushkina and A. S. Moskvina},
     title = {A {Generalized} {Operator} {Notation} and its {Properties}},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {13--25},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2012_5_1_a1/}
}