1. https://product.tdk.com/info/en/techlibrary/archives/techjournal/vol13_mlp2012-v/contents02.html.
2. https://www.murata.com/en-eu/products/inductor/power/learn/basic_01/basic_01_3
3. E.C. Snelling, Soft Ferrites: Properties and Applications, 2nd edn. (Butterworths, London, 1988)
4. T. Nomura and A. Nakano, Proceedings of the Sixth International Conference on Ferrites, Tokyo, 1198–1201 (1992)
5. T. Nakamura, Y. Okano, J. Phys. IV 7, C191–C192 (1997)