I. Hutov, P. Nedyalkova, and H. Hristov, “SECURE AND RESILIENT OPERATION OF HYBRID PV-WIND-STORAGE SYSTEMS FOR MODULAR E-FUEL PRODUCTION UNDER DISTURBANCES”, SysTechDev, vol. 3, pp. 379–386, Sep. 2026, doi: 10.68302/std2026.vol3.180.