01416nam a2200325 i 450099100087044970753620020507102549.0960328s1950 us ||| | eng b10141236-39ule_instLE00638302ExLDip.to Fisicaita510.34531QA871Lefschetz, Solomon12523Contributions to the theory of nonlinear oscillations /S. Lefschetz, L. Cesari and J. Lasalle (eds.)Princeton, NJ :Princeton University Press,1950-v. :ill.OscillationsLasalle, J.Cesari, Lamberto.b1014123621-09-0627-06-02991000870449707536LE006 510.34/510.39 LEFV. 112006000021302le006-E0.00-l- 00000.i1016754727-06-02LE006 510.34/510.39 LEFV. 212006000021319le006-E0.00-l- 00000.i1016755927-06-02LE006 510.34/510.39 LEFV. 512006000021326le006-E0.00-l- 00000.i1016756027-06-02LE006 510.34/510.39 LEFV. 312006000021449le006-E0.00-l- 00000.i1016757227-06-02Contributions to the theory of nonlinear oscillations186694UNISALENTOle00601-01-96ma -engus 04