1. Ciccu R, Grosso B (2010) Improvement of the excavation performance of PCD drag tools by water jet assistance. Rock Mech Rock Eng 43(4):465–474
2. Ciccu R, Grosso B, Ortu G, Agus M, Bortolussi A, Vašek J, Jekl P (1999) Rock disintegration using waterjet-assisted diamond tools. In: Proceedings of the 10th American Waterjet Conference (AWJC), Houston, Texas, 14–17 August 1999
3. Ciccu R, Grosso B, Loddo C, Bortolussi A, Vašek J (2004) Waterjet-assisted drag tools for rock excavation. In: Proceedings of the 17th International Conference on Water Jetting Advances and Future Needs, Mainz, Germany, 7–9 September 2004
4. Cook NGW, Hood M, Tsai F (1984) Observations of crack growth in hard rock loaded by an indenter. Int J Rock Mech Min Sci Geomech Abstr 21(2):97–107
5. Dubugnon O (1981) An experimental study of water assisted drag bit cutting of rocks. In: Proceedings of the 1st US Water Jet Symposium, Golden, Colorado, April 1981 (II-4.1–II-4.11)