@article{702281,
     title = {O nekotorykh novykh klassakh uravnenii matematicheskoi fiziki},
     booktitle = {Equadiff 5},
     series = {GDML\_Books},
     publisher = {BSB B.G. Teubner Verlagsgesellschaft},
     address = {Leipzig},
     year = {1982},
     pages = {159-164},
     zbl = {0525.35058},
     url = {http://dml.mathdoc.fr/item/702281}
}

Novikov, V. A.; Lar'kin, Nikolai A.; Yanenko, N. N. О некоторых новых классах уравнений математической физики, dans Equadiff 5, GDML_Books,  (1982), pp. 159-164. http://gdmltest.u-ga.fr/item/702281/