انتشارات Technical University Of Sofia
Strength of materials handbook
Associate Professor PhD Engineer Nikolay Nikolov, 2013
Mathematics I. Calculus and analytic geometry part 2
S. Donevska, B. Donevsky, 2007
Mathematics I. Calculus and analytic geometry part 1
S. Donevska, B. Donevsky, 2006
Mathematics I. Calculus and analytic geometry part 3
S. Donevska, B. Donevsky, 2009
Mechanics. Part I. Statics and kinematics
Ivan Kralov, 2010
