G. Hyeon Jang, S. Won Seo, C. Woo Kim, K. Hun Shin, J. Nah, and J. Young Choi, “Design of Axial Flux Type Permanent Magnet Coupling with Halbach Magnet Array for Optimal Performance Considering Eddy Current Loss Reduction Using 3-D Finite Element Method”, IJET, vol. 7, no. 3.34, pp. 184–187, Sep. 2018, doi: 10.14419/ijet.v7i3.34.18960.