1. J. Álvarez, R. J. Bagby, D. S. Kurtz and C. Pérez,
Weighted estimates for commutators of linear operators,
Studia Math. 104 (1993), no. 2, 195–209.
2. M. Bramanti and M. C. Cerutti,
Wp1,2W_{p}^{1,2} solvability for the Cauchy–Dirichlet problem for parabolic equations with VMO coefficients,
Comm. Partial Differential Equations 18 (1993), no. 9–10, 1735–1763.
3. A.-P. Calderón,
Commutators of singular integral operators,
Proc. Natl. Acad. Sci. USA 53 (1965), 1092–1099.
4. A.-P. Calderón,
Commutators, singular integrals on Lipschitz curves and applications,
Proceedings of the International Congress of Mathematicians (Helsinki 1978),
Academia Scientiarum Fennica, Helsinki (1980), 85–96.
5. A. P. Calderón and A. Zygmund,
On the existence of certain singular integrals,
Acta Math. 88 (1952), 85–139.