Raška, J., M. Tyč, A. Štefek, and L. M. Hlaváč. “POSSIBILITIES OF 3D MACHINING OF MATERIALS BY ABRASIVE WATER JETS”. GeoScience Engineering, vol. 65, no. 2, June 2019, pp. 18-23, http://www.geoscience.cz/ojs/index.php/GSE/article/view/241.