Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Toda Hiroko,Correlation of the sulfhydryl group with the essential calcium in Bacillus subtilis saccharifying α-amylase,The journal of biochemistry,0021924X,Tokyo : Japanese Biochemical Society,1968-03,63,3,302-307,https://cir.nii.ac.jp/crid/1521417755423030528,