1. Kim, G.-M., Ryoo, Y.-J.: Development of Automatic Guided Mobile Robot Using Magnetic Position Meter. In: Proceedings of World Academy of Science, Engineering and Technology, vol. 25 (2007)
2. Im, D.-Y., Kim, D.-Y., Lee, Y.-J., Ryoo, Y.-J., Cha, H.-R.: Unmanned Driving of Intelligent Robotic Vehicle. In: Proceedings of International Symposium on Advanced Intelligent Systems (2009)
3. Choi, K.-H.: Low-speed electric vehicles for driving high-efficiency, high-density development of the controller module. Department of Electrical Engineering, Graduate School of Chonnam National University, worthy scholar thesis for a degree (2012)
4. Lim, D.: Robotic vehicle using guidance system based on magnetic marker. Department of Control System Engineering Graduate School of Mokpo National University, doctor thesis for a degree (2008)
5. Do., H.: Design of centrifugal belt pulley for continuously variable transmission(CVT) of electric vehicle. Department of Control and Instrumentation Engineering, Graduate School of Industry, Pukyoung National University, worthy scholar thesis for a degree (2012)