“In memoriam FEDERICO R. AZNAR GIL (1953-2021) Obligationes essentiales assumere”, REDC, vol. 78, no. 190, pp. 017–018, Jun. 2022, Accessed: Feb. 11, 2026. [Online]. Available: https://revistas.upsa.es/index.php/derechocanonico/article/view/329