Author(s):
1. Stevan Maksimović, Vojnotehnički Institut Beograd, Serbia
2. Ivana Vasović, Institut Goša, Milana Rakića 35, Beograd, Serbia
3. Mirko Maksimović, Waterworks and Sewerage, Serbia
4. Mirjana Đurić, Military Tehnical Institute Belegrad, Serbia

Applied paper from author