(ja) Kohei Hirano et Masaki Takahashi, «日光男体火山最末期噴出物の斑晶鉱物化学組成とマグマ溜りプロセス» [«Chemical composition of phenocrysts in products of the last eruption of Nikko-Nantai Volcano, central Japan, and its implications for the processes in magma chamber»], Proceedings of the Institute of Natural Sciences, Tokyo, Nihon University, vol.41, , p.124 (ISSN1343-2745, lire en ligne[PDF], consulté le ).
(ja) Kohei Hirano et Masaki Takahashi, «日光男体火山最末期噴出物の斑晶鉱物化学組成とマグマ溜りプロセス» [«Chemical composition of phenocrysts in products of the last eruption of Nikko-Nantai Volcano, central Japan, and its implications for the processes in magma chamber»], Proceedings of the Institute of Natural Sciences, Tokyo, Nihon University, vol.41, , p.124 (ISSN1343-2745, lire en ligne[PDF], consulté le ).