1. Agmon,On the eigenfunctions and on the eigenvalues of general elliptic boundary value problems, Comm. Pure Applied. Math.,15 (1962), p. 119.
2. Agmon -Douglis -Nirenberg,Estimates near the boundary for solutions of elliptic partial differential equations, Comm. Pure Applied Math.,12 (1959), p. 623.
3. Benilan-ha, Equations d'évolution du type (du/dt) + β∂φ(u)∋0 dans L∞(Ω), Note C.R.A.S.,281 (1975), pp. 947–950.
4. Brezis,Opérateurs maximaux monotones et semi-groupes de contractions dans les espaces de Hilbert, Math. Studies 5, North Holland, 1973.
5. Brezis - Fraenkel,A function with prescribed initial derivatives in different Banach spaces (à para'tre).