%0 Journal Article %A A. P. Katchalov %T A coordinate system for describing the ``quasiphoton'' %J Zapiski Nauchnykh Seminarov POMI %D 1984 %P 73-76 %V 140 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1984_140_a6/ %G ru %F ZNSL_1984_140_a6