1. Inequalities;Beckenbach,1965
2. On inequalities with alternating signs;Bellman,1959
3. On the interpolation of normed linear spaces—a necessary condition;Bergh;Technical report,1971
4. Semigroups of operators and approximation;Butzer,1967
5. Interpolation d'espaces qui sont ni normés, ni complets: Applications;Krée;Ann. Inst. Fourier,1968