1. Boccardo, L., Gallouët, T., Murat, F.: Unicité de la solution de certaines équations elliptiques non linéaires. C. R. Acad. Sci. Paris Ser. I Math. 315, 1159–1164 (1992)
2. Brandts, J., Korotov, S., Křížek, M.: Simplicial Partitions with Applications to the Finite Element Method. Springer, Cham (2020)
3. Faragó, I., Korotov, S., Szabó, T.: On continuous and discrete maximum principles for elliptic problems with the third boundary condition. Appl. Math. Comput. 219, 7215–7224 (2013)
4. Feistauer, M., Křížek, M., Sobotíková, V.: An analysis of finite element variational crimes for a nonlinear elliptic problem of a nonmonotone type. East-West J. Numer. Math. 1, 267–285 (1993)
5. Gilbarg, D., Trudinger, N.S.: Elliptic Partial Differential Equations of Second Order. Springer, Berlin (1977)