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Math. 7 (2020), Article ID 100119.","DOI":"10.1016\/j.rinam.2020.100119"},{"key":"2025110513331203592_j_cmam-2025-0007_ref_007","doi-asserted-by":"crossref","unstructured":"E.  Casas,\nBoundary control of semilinear elliptic equations with pointwise state constraints,\nSIAM J. Control Optim. 31 (1993), no. 4, 993\u20131006.","DOI":"10.1137\/0331044"},{"key":"2025110513331203592_j_cmam-2025-0007_ref_008","doi-asserted-by":"crossref","unstructured":"P. G.  Ciarlet,\nThe Finite Element Method for Elliptic Problems,\nStud. Math. Appl. 4,\nNorth-Holland, Amsterdam, 1978.","DOI":"10.1115\/1.3424474"},{"key":"2025110513331203592_j_cmam-2025-0007_ref_009","doi-asserted-by":"crossref","unstructured":"M.  Dauge,\nElliptic Boundary Value Problems on Corner Domains,\nLecture Notes in Math. 1341,\nSpringer, Berlin, 1988.","DOI":"10.1007\/BFb0086682"},{"key":"2025110513331203592_j_cmam-2025-0007_ref_010","doi-asserted-by":"crossref","unstructured":"I.  Ekeland and R.  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