1. Interpolation Spaces;Bergh,1976
2. Approximation of functions of the Wp-classes by piecewise-polynomial functions;Birman;Mat. Sb.,1967
3. Distribution of the eigenvalues of nuclear operators in Banach spaces;Carl;Vestnik Moskov Univ. Ser. Mat. Meh.,1976
4. Entropy numbers, s-numbers, and eigenvalue problems;Carl;J. Fund. Anal.,1981
5. Entropy numbers of embedding maps between Besov spaces with an application to eigenvalue problems;Carl,1981