1. The rectangular constant for two-dimensional spaces;Benítez;J. Approximation Theory,1977
2. Lectures on Analysis;Choquet,1969
3. Normed Linear Spaces;Day,1973
4. The best possible net and the best possible cross section of a set in a normed space;Garkavi;Izv. Akad. Nauk SSSR Ser. Mat.,1962