1. Industries That Can’t Do without Custom Machininghttps://roboticsandautomationnews.com/2019/08/16/5-industries-that-cant-do-without-custom-machining/25082/
2. CNC Machining Projected to be $100B Industry by 2025https://www.thomasnet.com/insights/cnc-machining-projected-to-be-100b-industry-by-2025/
3. CNC Machining Industry Trends 2019-3ERPhttps://www.3erp.com/blog/cnc-machining-industry-trends-2019/
4. Cutting force modeling;Vazquez,2014
5. Cutting, fundamentals;Toenshoff,2014