@article{ZVMMF_2002_42_5_a9,
     author = {S. A. Varentsova and V. A. Trofimov},
     title = {Invariants of nonlinear interaction of femtosecond pulses in the presence of third-order dispersion},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {709--717},
     publisher = {mathdoc},
     volume = {42},
     number = {5},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2002_42_5_a9/}
}