@article{oai:nagoya.repo.nii.ac.jp:00030775,
 author = {Ohara, Yoshiro},
 issue = {2},
 journal = {Memoirs of the Faculty of Engineering, Nagoya University},
 month = {Mar},
 note = {It is very difficult problem how to clssify the tooth surfaces. In this paper, we define a functional (or differential) equation which is satisfied with the tooth surfaces. And by classifying the solutions of this equation, we can approach that classification problem.},
 pages = {279--286},
 title = {On a functional equation which is satisfied with tooth surfaces},
 volume = {38},
 year = {1987}
}