Pyskun, I., Tkach, Y., Khoroshko, V., Khokhlachova, Y., Ayasrah , A. R. A. and Al-Dalvash, A. F. (2020) “Quantitative assessment and determination of the level of cyber security of state information systems”, Ukrainian Scientific Journal of Information Security, 26(3), pp. 131–138. doi: 10.18372/2225-5036.26.14974.