فهرس المقالات The matrix of key competencies and required level of their development حرية الوصول المقاله صفحة الملخص نص كامل 1 - Competencies of Personnel in Economy 4.0: Challenges and Solutions Nina Chala Oksana Poplavska Nataliya Danylevych Mariya Maksma 10.22094/joie.2020.677818
