Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KIYAMA Shuichi and MAEDA Shuichi,Security Paper Sheets Using Kapok Fibers Containing Chromic Materials,Journal of Printing Science and Technology,09143319,The Japanese Society of Printing Science and Technology,2017,54,1,023-026,https://cir.nii.ac.jp/crid/1390282679067529600,https://doi.org/10.11413/nig.54.023