著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Jun Chen and Masae Shiyomi and Charles D. Bonham,Plant cover estimation based on the beta distribution in grassland vegetation,Ecological research,09123814,Tokyo : Springer Japan,2008-09,23,5,813-819,https://cir.nii.ac.jp/crid/1521980704786641280,