Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Handa Yoshinobu,Über Zweckerreichung,journal of private law,03873315,Japan Association of private law,1978,1978,40,166-170,https://cir.nii.ac.jp/crid/1390001205413752448,https://doi.org/10.11324/shiho1949.1978.166