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) Sebastian Mueller and Bettina Scheu and Ulrich Kueppers and Oliver Spieler and Dominique Richard and Donald B. Dingwell,The porosity of pyroclasts as an indicator of volcanic explosivity,Journal of Volcanology and Geothermal Research,0377-0273,Elsevier BV,2011-06,203,3-4,168-174,https://cir.nii.ac.jp/crid/1362262943901538432,https://doi.org/10.1016/j.jvolgeores.2011.04.006