CHEKHLA, Serhii. THE PLACE OF THE PORTFOLIO OF PROJECTS AND PROGRAMS IN THE STRATEGIC MANAGEMENT SYSTEM: A COMPARATIVE ANALYSIS OF THE PMI, PRINCE2 (MOP), SAFE AND BALANCED SCORECARD APPROACHES. European Journal of Interdisciplinary Issues, [S. l.], v. 2, n. 3, p. 115–126, 2025. DOI: 10.5281/zenodo.19037873. Disponível em: https://eujini.org.pl/index.php/journal/article/view/48. Acesso em: 27 jun. 2026.