A System-of-Systems Approach for the Creation of a Composite Cyber Range for Cyber/Hybrid Exercising. Information & Security: An International Journal 50, no. 2 (2021): 129-148;

Sharkov, George, Christina Todorova, Georgi Koykov, and Georgi Zahariev.
https://doi.org/10.11610/isij.5029 [open access]