1. (1) Y. Hori: “Future Vehicle Driven by Electricity and Control Research on Four Wheel Motored “UOT Electric March II””, IEEE Trans. IE, Vol. 51, No. 5, pp. 954-962 (2004)
2. (2) M. Suzuki, K. Sakai, K. Okada, and Y. Makino: “Development of In-Wheel Motor Type Axle Unit”, NTN TECHNICAL REVIEW, No. 75, pp. 46-52 (2007) (in Japanese)
3. (3) S. Murata: “Development of In-Wheel Motor Drive Unit”, 2010 JSAE Annual Congress (Spring), No. 28-10, pp. 5-9 (2010) (in Japanese)
4. (4) NTN corporation, WO2013108546 A1 (2013)
5. (5) Toyota Motor Corporation, P2012-223041A (2012) (in Japanese)