1. [1] A. Alvino, L. Boccardo, V. Ferone, L. Orsina, and G. Trombetti, “Existence results for nonlinear elliptic equations with degenerate coercivity”, Ann. Mat. Pura Appl. (4) 182:1 (2003), 53–79.
2. [2] P. Bénilan, L. Boccardo, T. Gallouët, R. Gariepy, M. Pierre, and J. L. Vázquez, “An -theory of existence and uniqueness of solutions of nonlinear elliptic equations”, Ann. Scuola Norm. Sup. Pisa Cl. Sci. (4) 22:2 (1995), 241–273.
3. [3] L. Boccardo, “The summability of solutions to variational problems since Guido Stampacchia”, RACSAM. Rev. R. Acad. Cienc. Exactas Fís. Nat. Ser. A Mat. 97:3 (2003), 413–421.
4. [4] L. Boccardo, G. Croce, and L. Orsina, “Nonlinear degenerate elliptic problems with solutions”, Manuscripta Math. 137:3-4 (2012), 419–439.
5. [5] L. Boccardo, A. Dall’Aglio, and L. Orsina, “Existence and regularity results for some elliptic equations with degenerate coercivity”, Atti Sem. Mat. Fis. Univ. Modena 46 (1998), 51–81.