Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) HOWLING GI,The effect of chitin and chitosan on the proliferation of human skin fibroblasts and keratinocytes in vitro,Biomaterials,,,2001,22,,2959-2966,https://cir.nii.ac.jp/crid/1570291225111706496,