@article{oai:ipsj.ixsq.nii.ac.jp:00060197,
 author = {Akio, Sasaki and Yasutomo, Ozawa and Akio, Sasaki and Yasutomo, Ozawa},
 issue = {0},
 journal = {Information Processing in Japan},
 month = {Jan},
 pages = {63--69},
 title = {Hybrid Isograph},
 volume = {12},
 year = {1972}
}