00976nmm a22002655u 4500991001285009707536cr nn 008mamaa100301s2009 de j eng d9783642002281b13990342-39ule_instDip.to MatematicaengIbragimov, Nail Hajrullovic44975Approximate and renormgroup symmetries[e-book] /by Nail H. Ibragimov, Vladimir F. KovalevBerlin :Springer,2009v.: digitalNonlinear Physical Science,1867-8440MathematicsKovalev, Vladimir F.Springer eBookshttp://dx.doi.org/10.1007/978-3-642-00228-1An electronic book accessible through the World Wide Web .b1399034203-03-2228-06-11991001285009707536Approximate and renormgroup symmetries247383UNISALENTOle01328-06-11m@ -engde 00