Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Gohta Masuda and Susumu Tomioka,Possible β-Lactamase Activities Detectable in Infective Clinical Specimens,The journal of antibiotics : an international journal,00218820,Tokyo : Japan Antibiotics Research Association,1977-12,30,12,p1093-1097,https://cir.nii.ac.jp/crid/1521417754663332864,