Epler, Igor J., Ranko C. Božičković, Slaviša N. Arsić, and Jelena B. Dinić. 2015. “Real Improvement Processes in the Army Based on the Lean Six Sigma Concept”. Vojnotehnički Glasnik Military Technical Courier 64 (4): 1132-56. https://doi.org/10.5937/vojtehg64-8242.