[[1] Atanasova - Krasteva N., Leadership building of cadets, Veliko Tarnovo, 2012]Search in Google Scholar
[[2] Semerdjiev Tsv., Strategic leadership and leadership. Leader., Softrade, Sofia., 2007]Search in Google Scholar
[[3] Semerdjiev Tsv., Theoretical foundations of national security, http://semerdjiev.com/wpcontent/uploads/2014/10/01]Search in Google Scholar
[[4] Slatinski N., Security dimensions, Publ. house “Pradigma”,Sofia, 2000]Search in Google Scholar
[[5] Vasil Levski NMU, www.nvu.bg.]Search in Google Scholar