%0 Journal Article %T Generalized nonlinear Schrödinger equations describing the Second Harmonic Generation of femtosecond pulse, containing a few cycles, and their integrals of motion %A Trofimov, Vyacheslav A. %A Stepanenko, Svetlana %A Razgulin, Alexander %J PLoS ONE %V 14 %N 12 %D 2019-12-12 %I Public Library of Science %~ DeepDyve