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2. Springer Lect;Bergh,1984
3. and , Interpolation Spaces. Grundlehren 233, SPRINGER, Berlin-New York-Heidelberg (1976)
4. A Note on Interpolation of Differentiable Locally LIPSCHITZ continuous maps. Preprint Nr. 168, Sektion Mathematik an der HUMBOLDT-Universität zu Berlin (1988)
5. Classes d'Interpolation associeés un operateur maximal monotoné, Sem. sur les Equations aux Deriveés Partielles, Coll. de France, (1973–74) (cf. also SPRINGER'S Lecture Notes in Mathem. No. 446)