00958nam a2200277 i 450099100114203970753620020507111833.0970308s1972 us ||| | eng b10179525-39ule_instLE00642845ExLDip.to Fisicaita510'.8510.34QA1Giacaglia, G.463235Perturbation methods in non-linear systems /G.E.O. GiacagliaNew York ; Berlin :Springer,1972viii, 369 p. ;26 cm.Differential equationsPerturbation (Mathematics).b1017952521-09-0627-06-02991001142039707536LE006 510.34/510.39 GIA12006000021289le006-E0.00-l- 00000.i1022028827-06-02Perturbation methods in non-linear systems189059UNISALENTOle00601-01-97ma -engus 01