M. T. Jocanović, V. V. Karanović, A. V. Ivanišević, and D. M. Knežević, “Hydraulic hammer excavator failure due to solid particle contamination”, Vojnoteh. glas., vol. 62, no. 1, pp. 112–129, Nov. 2013, doi: 10.5937/vojtehg62-4676.