Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) HUKUNAGA Kenzi and ITO Seisiro and KUWAHARA Tosihide,Preparation of Pigments of Cobalt (II) Phosphate Systems,Journal of the Japan Society of Colour Material,0010180X,Japan Society of Colour Material,1977,50,8,440-443,https://cir.nii.ac.jp/crid/1390282680442226688,https://doi.org/10.4011/shikizai1937.50.440