RANACHOWSKI, Zbigniew, Daria JÓŹWIAK–NIEDŹWIEDZKA, Andrzej M. BRANDT, and Tomasz DĘBOWSKI. 2013. “Application of Acoustic Emission Method to Determine Critical Stress in Fibre Reinforced Mortar Beams”. Archives of Acoustics 37 (3): 261–268. https://acoustics3.ippt.pan.pl/index.php/aa/article/view/90.