“The Application of Reduction Coefficients of the Usual Retirement Age in the Railway Sector. Regarding the Sentence of 21 June 2017 (Rec. 1281 2014), Delivered by the Employment Division of the Supreme Court”. Revista de Derecho de la Seguridad Social, Laborum, no. 14, Feb. 2018, https://revista.laborum.es/index.php/revsegsoc/article/view/272.