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35Pxx Spectral theory and eigenvalue problems for partial differential operators (1 articles)

• Fichera, G.: Structure of Green's operators and estimates for the corresponding eigenvalues. (English). In: Šeda, Valter (ed.): Differential Equations and Their Applications. Proceedings of the Conference held in Bratislava in September 1966. Slovenské pedagogické nakladateľstvo, Bratislava, 1967. pp. 249-272