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Transposition des problèmes aux limites elliptiques. (French) Zbl 0256.35029
Sympos. math., Roma 7, Probl. Evoluz. 1970, Equ. ipoellitt. Spazi funzion. 1971, 421-441 (1971).

35J25 Boundary value problems for second-order elliptic equations
35D05 Existence of generalized solutions of PDE (MSC2000)
35R20 Operator partial differential equations (= PDEs on finite-dimensional spaces for abstract space valued functions)