KIKUMASA Isao, KOIKE Kazutoshi, OSHIRO Kiyoichi. Complex rings, Quaternion rings and Octonion rings. Proceedings of the 50th Symposium on Ring Theory and Representation Theory. 2018. 74-83
Kazutoshi Koike. A characterization of the class of Harada rings. Proceedings of the 47th Symposium on Ring Theory and Representation Theory. 2015. 93-99
Kazutoshi Koike. Book review "Y. Baba and K. Oshiro: Classical Artinian Rings and Related Topisc". Suugaku. 2012. 64. 430-434
Kazutoshi Koike. Azumaya's conjecture and Harada rings. 2007. 90-95
Kazutoshi Koike. Self-duality of quasi-Harada ring and locally distributive rings. 2005. 110-115