@MISC {Dempa1,
    TITLE = {星型領域はユークリッド空間に微分同相},
    AUTHOR = {ナンブキトラ},
    NOTE = {はてなブログ「電波通信」URL:\url{https://concious4410.hatenablog.com/entry/2016/07/06/194138}},
}


@article {MR4103879,
    AUTHOR = {Gutev, Valentin},
     TITLE = {Lipschitz extensions and approximations},
   JOURNAL = {J. Math. Anal. Appl.},
  FJOURNAL = {Journal of Mathematical Analysis and Applications},
    VOLUME = {491},
      YEAR = {2020},
    NUMBER = {1},
     PAGES = {124242, 13},
      ISSN = {0022-247X,1096-0813},
   MRCLASS = {54E40 (26A16)},
  MRNUMBER = {4103879},
MRREVIEWER = {Mihai\ Turinici},
       DOI = {10.1016/j.jmaa.2020.124242},
       URL = {https://doi.org/10.1016/j.jmaa.2020.124242},
}


@MISC {117475,
    TITLE = {Manifolds with two coordinate charts},
    AUTHOR = {Andy Putman (https://mathoverflow.net/users/317/andy-putman)},
    HOWPUBLISHED = {MathOverflow},
    NOTE = {URL:\url{https://mathoverflow.net/q/117475} (version: 2022-07-21)},
    EPRINT = {https://mathoverflow.net/q/117475},
    URL = {https://mathoverflow.net/q/117475}
}



@article {MR0126835,
    AUTHOR = {Brown, Morton},
     TITLE = {The monotone union of open {$n$}-cells is an open {$n$}-cell},
   JOURNAL = {Proc. Amer. Math. Soc.},
  FJOURNAL = {Proceedings of the American Mathematical Society},
    VOLUME = {12},
      YEAR = {1961},
     PAGES = {812--814},
      ISSN = {0002-9939,1088-6826},
   MRCLASS = {54.78},
  MRNUMBER = {126835},
MRREVIEWER = {S.\ Marde\v si\'c},
       DOI = {10.2307/2034881},
       URL = {https://doi.org/10.2307/2034881},
}


@article {MR0161319,
    AUTHOR = {Kwun, Kyung Whan},
     TITLE = {Uniqueness of the open cone neighborhood},
   JOURNAL = {Proc. Amer. Math. Soc.},
  FJOURNAL = {Proceedings of the American Mathematical Society},
    VOLUME = {15},
      YEAR = {1964},
     PAGES = {476--479},
      ISSN = {0002-9939,1088-6826},
   MRCLASS = {54.78},
  MRNUMBER = {161319},
MRREVIEWER = {R.\ H.\ Rosen},
       DOI = {10.2307/2034528},
       URL = {https://doi.org/10.2307/2034528},
}



@MISC {4516,
    TITLE = {What are the open subsets of $\mathbb{R}^n$ that are diffeomorphic to $\mathbb{R}^n$},
    AUTHOR = {Georges Elencwajg (https://mathoverflow.net/users/450/georges-elencwajg)},
    HOWPUBLISHED = {MathOverflow},
    NOTE = {URL:\url{https://mathoverflow.net/q/4516} (version: 2013-07-10)},
    EPRINT = {https://mathoverflow.net/q/4516},
    URL = {https://mathoverflow.net/q/4516}
}

@book{matt, 
author={松本幸夫}, 
title={多様体の基礎}, 
publisher={東京大学出版会}, 
series={基礎数学５}, 
year={1998}, 
}


@MISC {none,
title={Analysis {III}}, 
author={Drink Ferus}, 
note={（ドイツ語）2015年10月閲覧．現在リンク切れ．行方不明．
URL:\url{https://page .math.tu-berlin.de/ferus/ANA/Ana3.pdf}}
}


@MISC {4468,
    TITLE = {What are the open subsets of $\mathbb{R}^n$ that are diffeomorphic to $\mathbb{R}^n$},
    AUTHOR = {Oliver (https://mathoverflow.net/users/1570/oliver)},
    HOWPUBLISHED = {MathOverflow},
    NOTE = {URL:\url{https://mathoverflow.net/q/4468} (version: 2020-12-28)},
    EPRINT = {https://mathoverflow.net/q/4468},
    URL = {https://mathoverflow.net/q/4468}
}






@MISC {198882,
    TITLE = {Is there a citeable reference for star-shaped open subsets of {R}\textasciicircum n being diffeomorphic to {R}\textasciicircum n?},
    AUTHOR = {Dmitri Pavlov (https://mathoverflow.net/users/402/dmitri-pavlov)},
    HOWPUBLISHED = {MathOverflow},
    NOTE = {URL:\url{https://mathoverflow.net/q/198882} (version: 2022-11-19)},
    EPRINT = {https://mathoverflow.net/q/198882},
    URL = {https://mathoverflow.net/q/198882}
}