Authors
Hiroshi Yamazaki
Nagano Prefectural Institute of Technology, Nagano, Japan
Keiichi Miyajima
Ibaraki University, Ibaraki, Japan
Yasunari Shidama
Karuizawa Hotch 244-1, Nagano, Japan
© 2021 Hiroshi Yamazaki, Keiichi Miyajima, Yasunari Shidama, published by University of Białystok
This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 License.