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[4] Ordinance No. H-19 on the terms and conditions for the development and planning of courses for acquiring, enhancing the qualification and re-qualification, as well as for the application of the military and civilian employees of the Ministry of Defense, the structures of the direct subordination of the Minister of Defense and the Bulgarian Army for training in them 2011
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[6] Enev E., Gradev K. Изследване влиянието на културните различия върху подготовката на военнослужещите за участие в контрасъпротивителни операции. (Study the impact of cultural differences on preparing the military for participation in counterinsurgency operations.) Collection of Reports of the Jubilee Scientific Conference on 10th Anniversary of the National Military University” Levski “in the town of Veliko Tarnovo 2012.p. 95-109, ISBN 978-954-753-095-9
[7] Stoykov S., Dimitrova S., Marinov P. Is science management of knowledge in the system for national security? Review of General Management – Vol.14, Issue 2/2011, Spiru Haret University Brasov Romania, p. 56-73, ISSN 1941-818X