@article{oai:soar-ir.repo.nii.ac.jp:00018415,
 author = {Okazaki, Hiroyuki and Endou, Noboru and Narita, Keiko and Shidama, Yasunari},
 issue = {2},
 journal = {Formalized Mathematics},
 month = {Jun},
 note = {Article, Formalized Mathematics. 19(2): 69-72 (2011)},
 pages = {69--72},
 title = {Differentiable Functions into Real Normed Spaces},
 volume = {19},
 year = {2011}
}