%0 Journal Article %A M. S. Shneerson %T Maxwell's equations and functionally invariant solutions of the wave equation %J Differencialʹnye uravneniâ %D 1968 %P 743-758 %V 4 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1968_4_4_a18/ %G ru %F DE_1968_4_4_a18