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100   $a20001205d1993----km-y0itay50------ba
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200 1 $aPeriodic solutions of singular lagrangian systems$fAntonio Ambrosetti, Vittorio Coti Zelati
210   $aBoston [MA]$cBirkhauser$dc1993
215   $axii, 157 p.$d24 cm
225 1 $aProgress in nonlinear differential equations and their applications$v10
610 0 $aSistemi dinamici
610 0 $aSistemi lagrangiani
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700  1$aAmbrosetti,$bAntonio$f<1944- >$038493
701  1$aCoti Zelati,$bVittorio$060429
801  0$aIT$bUNINA$gRICA$2UNIMARC
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996   $aPeriodic solutions of singular lagrangian systems$9376415
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