[[1] Bueno Campos, Eduardo, Curso b‘sico de Economќa de la Empresa, Pir‘mide, Madrid, 1994, p. 222.]Search in Google Scholar
[[2] Marinov Petar, Modern Challenges of Counter-Terrorism System Management, East-West, pp. 78, Sofia, Bulgaria, 2017.]Search in Google Scholar
[[3] Marinov Rumen, Exploring the capabilities of subdivisions in combat operations at critical times in urban terrain, Ph.D, dissertation, G.S. Rakovski National Defense College, Sofia, Bulgaria, 2012, pp. 112.]Search in Google Scholar
