Sánchez Reyes, C., M. Ugaz Olivares, and M. Pasco Lizárraga. “Roundtable "Collective Bargaining and Group of Companies"”. Derecho & Sociedad, no. 46, Aug. 2016, pp. 469-82, https://revistas.pucp.edu.pe/index.php/derechoysociedad/article/view/18868.