About this article
Published Online: Dec 27, 2013
Page range: 249 - 260
Received: Dec 31, 2013
DOI: https://doi.org/10.2478/forma-2013-0027
Keywords
© by Yuichi Futa
This work is licensed under the Creative Commons Attribution-ShareAlike 3.0 License. (CC BY-SA 3.0)
Yuichi Futa
Japan Advanced Institute of Science and Technology Ishikawa, Japan
Noboru Endou
Gifu National College of Technology Gifu, Japan
Yasunari Shidama
Shinshu University Nagano, Japan