1. Ministry of Land Infrastructure Transport and Tourism, Situation and changes surrounding the construction industry Reference material, March 2, (2016)
2. Watanabe Hiroshi, Ganbe Takeshi and Abe Takayuki, Noise and Vibration Control in Work to Drill Concrete. Part 1Laboratory Measurement of Vibration and Noise in a Reinforced Concrete Building, Summaries of technical papers of annual meeting Architectural Institute of Japan, pp 547–548, (1998)
3. Kaori Nagai, Current status and future prospects of optical technology in the fields of architecture and civil engineering, Optronics, no.444, pp58–64, (Japan, 2018)
4. Application of CO, Laser to Concrete Cutting
5. H. Yoshizawa, S. Wignarajah, and H. Saito, Study on laser cutting of concrete, Transactions of the Japan Welding Society, vol. 20, (1989)