1. Aoyama, M. (2014): Liquefaction occurrence ratio in the inland area caused by the 2011 off the Pacific coast of Tohoku Earthquake. Proceedings of the General Meeting of the Association of Japanese Geographers, 85, 69.
2. Aoyama, M. (2016): Reassessment of land condition of liquefied sites caused by the 2011 Tohoku earthquake and liquefaction potential. Abstract of Japan Geoscience Union Meeting 2016, HSC16-2.
3. Aoyama, M. and Une, H. (2016): Distribution of liquefied sites caused by the 2016 Kumamoto Earthquake and their land conditions.* http://janet-dr.com/11_saigaiji/160716kyushu_houkokukai/20160716pdf/22_ajg.pdf [Cited 2016/8/31].
4. Aoyama, M., Koyama, T. and Une, H. (2014): Geomorphological condition and land history of liquefaction damaged sites in the lower part of the Tone River Lowland induced by the 2011 off the Pacific Coast of Tohoku Earthquake. Geographical Review of Japan Series A, 87, 128-142.
5. Gojo, E. (1989): Present condition of gravel mining and its problems. Proceedings of the Institute of Natural Sciences, Nihon University, 24, 9-22.