Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 石塚 成人 and 山崎 剛,I=2ππ scattering length from two-pion wave function,Soryushiron Kenkyu Electronics,0371-1838,Soryushiron Kenkyu Editorial Office,2004,110,1,76-77,https://cir.nii.ac.jp/crid/1390001204069575552,https://doi.org/10.24532/soken.110.1_76