1. Boccardo, L.: Some elliptic problems with degenerate coercivity. Adv. Nonlinear Stud. 6, 1–12 (2006)
2. Boccardo, L.: Some developments on Dirichlet problems with discontinuous coefficients. Boll. Un. Mat. Italiana (9) 2(1), 285–297 (2009)
3. Boccardo, L., Brezis, H.: Some remarks on a class of elliptic equations with degenerate coercivity. Boll. Unione Mat. Ital. 6, 521–530 (2003)
4. Boccardo, L., Croce, G.: $$W^{1,1}_0$$ Solutions in Some Borderline Cases of Elliptic Equations with Degenerate Coercivity. Analysis and Topology in Nonlinear Differential Equations, 135–143, Progr. Nonlinear Differential Equations Appl., 85. Birkhäuser/Springer, Cham (2014)
5. Boccardo, L., Gallouët, T.: $$W_0^{1,1}$$ solutions in some borderline cases of Calderon–Zygmund theory. J. Differ. Equ. 253, 2698–2714 (2012)