著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Nagai, Nobuo and Hatori, Kozo",Multiport wave digital filters and directional couplers,,"Research Institute of Applied Electricity, Hokkaido University",1980,Monograph series of the Research Institute of Applied Electricity,,,,https://cir.nii.ac.jp/crid/1130000794715344640