1. IFR (2001) World Robotics: Statistics, market analysis, forecasts, case studies and profitability of robot investment: United Nations Economic Commission for Europe (UNECE), International Federation of Robotics.
2. IFR (2011) World Robotics: Statistics, market analysis, forecasts, case studies and profitability of robot investment: United Nations Economic Commission for Europe (UNECE), International Federation of Robotics.
3. OSHA Japan (1995) Study on accidents Involving industrial robot report no. 5, Labor Standard Bureau: Occupational Safety and Health Department, Japan Ministry of Labour.
4. Choo HK (2014) Virtual Reality-based Training System for Metal Active Gas Welding. Department of Mechanical Engineering: University of Malaya, Malaysia.
5. Invited review: The synergy between virtual reality and robotics;GC Burdea;IEEE Transactions on Robotics and Automation,1999