Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Toda Hiroko,Correlation of the masked sulfhydryl group with the essential calcium in Taka-amylase A,The journal of biochemistry,0021924X,Tokyo : Japanese Biochemical Society,1968-03,63,3,295-301,https://cir.nii.ac.jp/crid/1521136279788116224,