Tkach, M., Medynska, G., Hrytsyuk, Y. and Gibalo, K. 2024. Identification of basic requirements for portfolio management in the defense sector of leading NATO member states. Social Development and Security. 14, 3 (Jun. 2024), 256-267. DOI:https://doi.org/10.33445/sds.2024.14.3.18.