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) Houston C. Saunderson,Equations of motion and ballistic paths of volcanic ejecta,Computers & Geosciences,0098-3004,Elsevier BV,2008-07,34,7,802-814,https://cir.nii.ac.jp/crid/1361137044872104704,https://doi.org/10.1016/j.cageo.2007.10.004