01031nam2-2200337li-450 99000334262020331620180918160658.00-7204-2606-5000334262USA01000334262(ALEPH)000334262USA010003342622002009111973-------y0itay0103----baengBEMatched asymptotic expansions and singular perturbationsWiktor EckhausAmsterdam [etc.]North-Holland1973145 p.ill.24 cmNorth-Holland mathematics studies60010003342222001North-Holland mathematics studies6Matematica510ECKHAUS,Wiktor12826ITsalbcISBD990003342620203316510 NMS 66471/CBS51000111501BKSCIRSIAV69020091102USA011106Matched asymptotic expansions and singular perturbations437491UNISA