Burman, Erik. “A Primal Dual Mixed Finite Element Method for Inverse Identification of the Diffusion Coefficient and Its Relation to the Kohn-Vogelius Penalty Method”. Selecciones Matemáticas 10, no. 01 (junho 14, 2023): 16 - 28. Acessado maio 19, 2024. https://revistas.unitru.edu.pe/index.php/SSMM/article/view/5279.