@article{TMF_1993_97_2_a6,
     author = {A. M. Khodakovskii},
     title = {Direct proof of energy conservation for automorphic wave equation},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {247--249},
     publisher = {mathdoc},
     volume = {97},
     number = {2},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1993_97_2_a6/}
}