@article{ZVMMF_1999_39_10_a11,
     author = {S. A. Varentsova and V. A. Trofimov},
     title = {Invariants of multiwave nonlinear interaction of femtosecond laser pulses},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1740--1748},
     publisher = {mathdoc},
     volume = {39},
     number = {10},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1999_39_10_a11/}
}