scientific article; zbMATH DE number 3406475
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Publication:5673290
zbMATH Open0257.35042MaRDI QIDQ5673290
Publication date: 1973
Title of this publication is not available (Why is that?)
Degenerate elliptic equations (35J70) A priori estimates in context of PDEs (35B45) Higher-order elliptic equations (35J30) Partial differential equations of mixed type and mixed-type systems of partial differential equations (35M99)
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