1. On Lorentz–Zygmund spaces;Bennett;Dissertationes Math.,1980
2. Interpolation of Operators;Bennett,1988
3. Interpolation Spaces, An Introduction;Bergh,1976
4. Interpolation Functors and Interpolation Spaces, vol. 1;Brudnyĭ,1991
5. Semi-Groups of Operators and Approximation;Butzer,1967