When Participating in Humanitarian Operations, Revista Academiei Fortelor Terestre, Vol. XXII, Nr. 1(85) , 18-24.
Rational and prophylactic professional diet . (1974). Sofia: Medicine and Physical Education.
Stavrev, P., Sheytanov, M., & Donev, D. (1969). Military hygiene , Sofia, BG: Ministry of Defence.
Stefanov, N. (2017a). Analysis of the Use of Outsourcing Services for Maintenance and Repair of the Equipment and Armament Available in the Structures of the Bulgarian Armed Forces, The 23 rd International Conference Knowledge
Veken, Determining high voltage cable conductor temperatures, Euromold, Belgium;
 Florian Loos, Karl Dvorsky and Hans-Dieter Liess, Determination of temperature in high-voltage cables of finite length with, dynamic current profiles, Mathematical and Computer Modelling of Dynamical Systems, Vol. 00, No. 00, June 2013, 1–18;
 Murat Karahan and Özcan Kalenderli, Coupled Electrical and Thermal Analysis of Power Cables Using Finite Element Method, www.intechopen.com ;
 M. Rasoulpoor, M. Mirzaie and S. M. Mirimani, Electrical and Thermal