Algorithms of Hard c-Means Clustering Using Kernel Functions in Support Vector Machines. - Sadaaki Miyamoto; Youichi Nakayama (J. Adv. Comput. Intell. Intell. Informatics, 2003)

A Miniaturized Lumped-Element In-phase Power Divider with a Simple Layout. - Youichi Nakayama; Hitoshi Hayashi (UKSim, 2014)

Broadband 4-way power divider with 45° phase differences between output ports. - Hitoshi Hayashi; Youichi Nakayama; Jun-ichi Mizusawa (J. Frankl. Inst., 2017)