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100   $a2002009041979-------y0itay0103----ba
101 0 $aeng
102   $aNL
200 1 $aAsymptotic analysis of singular perturbations$fWiktor Eckhaus
210   $aAmsterdam [etc.]$cNorth-Holland$dcopyr. 1979
215   $aXI, 287 p.$cill.$d23 cm
225 2 $aStudies in mathematics and its applications$v9
410  1$1001000334609$12001$aStudies in mathematics and its applications$v9
606 1 $aPerturbazione <matematica>
676   $a531.35
700  1$aECKHAUS,$bWiktor$012826
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996   $aAsymptotic analysis of singular perturbations$932452
997   $aUNISA