Ancona, A.: Une propriété d’invariance des ensembles absorbants par perturbation d’un opérateur elliptique. Commun. Partial Differ. Equ. 4(4), 321–337 (1979)
Brezis, H., Marcus, M., Ponce, A.C.: Nonlinear elliptic equations with measures revisited. In: Mathematical Aspects of Nonlinear Dispersive Equations. Ann. Math. Stud., vol. 163, pp. 55–109. Princeton Univ. Press, Princeton, NJ (2007)
Brezis, H., Ponce, A.C.: Remarks on the strong maximum principle. Differ. Integral Equ, 16(1), 1–12 (2003)
Brezis, H., Ponce, A.C.: Kato’s inequality up to the boundary. Commun. Contemp. Math. 10(6), 1217–1241 (2008)
Maso, D., Gianni, M., Umberto: Wiener criteria and energy decay for relaxed Dirichlet problems. Arch. Rational Mech. Anal. 95(4), 345–387 (1986)
Littman, W., Stampacchia, G., Weinberger, H.F.: Regular points for elliptic equations with discontinuous coefficients. Ann. Scuola Norm. Sup. Pisa (3) 17, 43–77 (1963)
Malusa, A., Orsina, L.: Existence and regularity results for relaxed Dirichlet problems with measure data. Ann. Mat. Pura Appl. (4) 170, 57–87 (1996)
Marcus, M., Véron, L.: Nonlinear Second Order Elliptic Equations Involving Measures, De Gruyter Series in Nonlinear Analysis and Applications, vol. 21. De Gruyter, Berlin (2014)
Orsina, L., Ponce, A.C.: Hopf potentials for the Schrödinger operator. Anal. PDE 11(8), 2015–2047 (2018)
Orsina, L., Ponce, A.C.: On the nonexistence of Green’s function and failure of the strong maximum principle. J. Math. Pures Appl. (9) 134, 72–121 (2020)
Ponce, A.C.: Elliptic PDEs, measures and capacities. From the Poisson equations to nonlinear Thomas-Fermi problems. In: EMS Tracts in Mathematics, vol. 23. European Mathematical Society (EMS), Zürich (2016)
Ponce, A.C., Wilmet, N.: The Hopf lemma for the Schrödinger operator. Adv. Nonlinear Stud. 20(2), 459–475 (2020)
Trudinger, N.S.: On the positivity of weak supersolutions of nonuniformly elliptic equations. Bull. Aust. Math. Soc. 19(3), 321–324 (1978)