Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Keiji Igi and Shigeo Yazaki,Baryonium Spectroscopy Based on Duality and Unitarity,Progress of theoretical physics = 理論物理学の進歩,0033068X,Kyoto : Publication Office,1979-02,61,2,p487-502,https://cir.nii.ac.jp/crid/1520573330148709760,https://doi.org/10.1143/ptp.61.487