References
- v.20 Characterizations of Inner Product Spaces, Operator Theory: Advances and Applications D. Amir
- Proceedings of the Third International Conference on Probability in Banach spaces v.860 Martingale transforms and the geometry of Banach spaces D. L. Burkholder
- C. I. M. E. Lectures, Varenna (Como), Italy, 1985, Lecture Notes in Mathematics v.1206 Martingales and Fourier analysis an Banach spaces D. L. Burkholder
- Inner Product Structures V. I. Istratescu