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[8] HRNČIAR, M. Keystones of irregular warfare. In: The 23th International Conference. The Knowledge-Based Organization: Conference proceedings 1. Management and Military Sciences [electronic source]. Sibiu : “Nicolae Bălcescu” Land Forces Academy, 2017. ISBN 978-973-153-273-8, pp. 150-154.
[11] HRNČIAR, M. The Counterinsurgency Operating Environment. In: The 24th International Conference. The Knowledge-Based Organization: Conference proceedings 1. Management and Military Sciences [electronic source]. Sibiu: “Nicolae Bălcescu” Land Forces Academy, 2018. ISBN 978-973-153-325-4, pp. 87-92.