@article{ZNSL_1987_161_a6,
     author = {Yu. N. Sidorenko},
     title = {Elliptic bundle and generating operators},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {76--87},
     publisher = {mathdoc},
     volume = {161},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1987_161_a6/}
}