Fernández-Costales Muñiz, Javier. “Substantial Modifications of Working Conditions and Transfer of Undertakings: On the Choice of the Appropriate Procedural Route for Bringing a Claim: Commentary on Supreme Court Ruling 681 2026 of 21 July”. Revista de Trabajo y Seguridad Social. CEF, no. 495 (November 6, 2026). Accessed November 9, 2026. https://revistas.cef.udima.es/index.php/rtss/article/view/169-178.