1. Weak-L∞ and BMO;Bennett;Ann. of Math.,1981
2. Martingale transforms;Burkholder;Ann. Math. Stat.,1966
3. Boundary value problems and sharp inequalities for martingale transforms;Burkholder;Ann. Probab.,1984
4. Sharp inequalities for martingales and stochastic integrals, Colloque Paul Lévy (Palaiseau, 1987);Burkholder;Astérisque,1988
5. Semi-Groups of Operators and Approximation;Butzer,1967