N. Fujii and T. Mizuma, “Device with Functions of Linear Motor and Non-Contact Power Collector for Wireless Drive,” Transmission IEE of Japan, Vol. 126-D, No. 8, August 2006, pp. 1113-1118 (in Japanese).
 N. Fujii, H. Ashitomi and T. Mizuma, “Equivalent Circuit of Linear Transformer with Function of Linear Motor,” ISEF 2009—XIV International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering, Arras, France, September 2009.