TIRTOACA IRIMIA, O., V. NEDEFF, M. PANAINTE-LEHADUS, and C. TOMOZEI. “EFFICIENCY OF WATER FILTERING PROCESS DEPENDING ON THE FILTER LAYER POROSITY AND FLOW - A MATHEMATICAL MODEL”. Journal of Engineering Studies and Research, vol. 22, no. 4, Dec. 2016, pp. 54-61, http://jesr.ub.ro/1/article/view/97.