@article{SM_1971_15_3_a4,
     author = {P. M. Bleher and M. I. Vishik},
     title = {On a~class of pseudodifferential operators with an infinite number of variables, and applications},
     journal = {Sbornik. Mathematics},
     pages = {443--491},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1971_15_3_a4/}
}