@article{ZNSL_1999_262_a13,
     author = {N. D. Filonov},
     title = {The operator rot in an arbitrary region of finite measure},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {227--230},
     year = {1999},
     volume = {262},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1999_262_a13/}
}