Linear Elliptic Differential Systems and Eigenvalue Problems (Lecture Notes in Mathematics, 8)

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Partial Differential Equations of Elliptic Type

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Regular Boundary Value Problems Associated with Pairs of Ordinary Differential Expressions (Lecture Notes in Mathematics, 858)

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On Spectral Theory of Elliptic Operators

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Elliptic Pseudo-Differential Operators: An Abstract Theory (Lecture Notes in Mathematics, 756)

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Regularity Theory for Quasilinear Elliptic Systems and Monge - Ampere Equations in Two Dimensions (Lecture Notes in Mathematics, 1445)

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Propagation Des Singularites Des Solutions d'Equations Pseudo-Differentielles a Caracteristiques de Multiplicites Variables (Lecture Notes in Mathematics, 856) (French Edition)

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Singular Ordinary Differential Operators and Pseudodifferential Equations (Lecture Notes in Mathematics, 1128)