@article{SEMR_2013_10_a51,
     author = {M. V. Neshchadim},
     title = {Classes of generalized functional invariant solutions of wave {equation.~I}},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {418--435},
     year = {2013},
     volume = {10},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2013_10_a51/}
}