00711nam0-22002651i-450-99000084496040332120001010000084496FED01000084496(Aleph)000084496FED0100008449620001010d--------km-y0itay50------baitay-------001yyAsymptotic analysis of singular perturbationss.l.North-HollandEckhaus,Wiktor12826ITUNINARICAUNIMARCBK990000844960403321000084496000001FINBNFINBNAsymptotic analysis of singular perturbations32452UNINAING01