@misc{oai:chuo-u.repo.nii.ac.jp:00001095,
 author = {MASUDA, Kazuo and MITSUMATSU, Yoshihiko},
 month = {Sep},
 note = {application/pdf, We remark that there is no smooth flat function f (x) on [0,∞) such that for a fixed interval (0, α) (α > 0) on which the derivative of any higher order is positive.},
 title = {A small remark on flat functions},
 year = {2015}
}