Yasuo Kumagai. Contact, network, people, and geographical space: perspectives on the S&K network method and the Linguistic Atlas of Japan Database. Dialectologia. 2019. Special issue. 8. 117-144
Yasuo Kumagai. Developing Linguistic Atlas of Japan Database and advancing analysis of geographical distributions of dialects. Marie-Hélène Côté, Remco Knooihuizen & John Nerbonne (eds.), The future of dialects: Selected papers from Methods in Dialectology XV. Berlin: Language Science Press. 2016. 333-362
A quantitative observation of dialect diffusion based on population distributions and road networks
(9th Congress of the International Society for Dialectology and Geolinguistics (SIDG 2018, at the Institute of the Lithuanian Language and Vilnius University in Lithuania, Vilnius) 2018)
A quantitative observation of the relation among population distributions, road networks, and dialect similiarities
(Methods in Dialectology XVI (at NINJAL, Tokyo) 2017)
Developing Linguistic Atlas of Japan Database and advancing analysis of geographical distributions of dialects
(Methods XV (Methods in Dialectology, at University of Groningen) 2014)