1. ISO 9000 (2005) “Quality management systems — Fundamentals and vocabulary”.
2. “A question of competency”;Furnham;Personnel Management,1990
3. “Supporting life-long competence development using the TENCompetence infrastructure: a first experiment”;Schoonenboom;International Journal Of Emerging Technologies In Learning (IJET),2008
4. “DigComp 2.1: The Digital Competence Framework for Citizens with eight proficiency levels and examples of use”;Carretero Gomez,2017
5. “EntreComp: The Entrepreneurship Competence Framework”;Bacigalupo,2016