Masataka Kaneko Hajime Izumi Kiyoshi Kitahara Takayuki Abe Kenji Fukazawa Masayoshi Sekiguchi Yuuki Tadokoro Satoshi Yamashita Setsuo Takato A Simple Method of the Surface Drawing Suitable for Teaching Materials with the Aid of CAS. 35-45 2008 ICCS (2) http://dx.doi.org/10.1007/978-3-540-69387-1_5 conf/iccS/2008-2 db/conf/iccS/iccS2008-2.html#KanekoIKAFSTYT08