@article{TRSPY_1999_224_a18,
     author = {A. N. Parshin},
     title = {On {a~Ring} of {Formal} {Pseudodifferential} {Operators}},
     journal = {Informatics and Automation},
     pages = {291--305},
     publisher = {mathdoc},
     volume = {224},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1999_224_a18/}
}