Young Yoon, Keun. “A Study on Characteristics Improvement of Concentrated Flux IPM BLDC Motor Using the Flared-Shape Rotor Structure With Ferrite Magnets”. International Journal of Engineering & Technology, vol. 7, no. 2.12, Apr. 2018, pp. 301-3, https://doi.org/10.14419/ijet.v7i2.12.11310.