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101  1$aeng
200 1 $aMaximum Principles in Differential Equations$fM. H. Protter, Weinberger
210   $aEnglewood Cliffs [N.J.]$cPrentice-Hall$d1967
610 0 $aEquazioni differenziali
700  1$aProtter,$bMurray H.$f<1918- >$040750
701  1$aWeinberger,$bHans F.$040586
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996   $aMaximum Principles in Differential Equations$9380409
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