@article{ZNSL_1984_140_a6,
     author = {A. P. Katchalov},
     title = {A coordinate system for describing the {\textquotedblleft}quasiphoton{\textquotedblright}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {73--76},
     year = {1984},
     volume = {140},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1984_140_a6/}
}