1. Boccardo L.: Some developments on Dirichlet problems with discontinuous coefficients. Boll. Unione Mat. Ital. 2, 285–297 (2009)
2. Boccardo L.: Dirichlet problems with singular convection term and applications. J. Differential Equations 258, 2290–2314 (2015)
3. L. Boccardo: Stampacchia-Calderon-Zygmund theory for linear elliptic equations with discontinuous coefficients and singular drift; preprint.
4. Bottaro G., Marina M.E.: Problema di Dirichet per equazioni ellittiche di tipo variazionale su insiemi non limitati. Bollettino U.M.I. 8, 46–56 (1973)
5. G.R. Cirmi, S. D’Asero, S. Leonardi: Morrey estimates for a class of elliptic equations with drift term; preprint.