@article{oai:kagawa-u.repo.nii.ac.jp:00002199,
 author = {松本, 啓資 and Matsumoto, Keisuke and 藤田, 和憲 and Fujita, Kazunori and 深石, 博夫 and Fukaishi, Hiroo},
 issue = {2},
 journal = {香川大学教育学部研究報告 第Ⅱ部, Memoirs of the Faculty of Education, Kagawa University. Part II},
 month = {Oct},
 note = {Arbitrary curves drawn by a spirograph can be obtained as loci of the isogonal conjugate to a point for an equilateral triangle which moves along a circle.},
 pages = {39--57},
 title = {Plane algebraic curves drawn by a spirograph and teh isogonal conjugate for a triangle},
 volume = {59},
 year = {2009},
 yomi = {マツモト, ケイスケ and フジタ, カズノリ and フカイシ, ヒロオ}
}