Ryukoku University
Seta Ohtsu, Japan
Address:
Seta Ohtsu 520-2194
Japan
Phone: +81-75-753-7246
Fax: +81-75-753-7272
E-mail: tsutomu@math.ryukoku.ac.jp
URL: http://lab531.math.ryukoku.ac.jp/~tsutomu/private_e.html