Johnson, Dale M. (1977). "Prelude to dimension theory: the geometrical investigations of Bernard Bolzano". Archive for History of Exact Sciences. 17 (3): 262–295. doi:10.1007/BF00499625. MR0446838. See p. 285.
Nguyen, Phuong; Cook, Stephen A. (2007). "The Complexity of Proving the Discrete Jordan Curve Theorem". 22nd Annual IEEE Symposium on Logic in Computer Science (LICS 2007). IEEE. pp. 245–256. arXiv:1002.2954. doi:10.1109/lics.2007.48. ISBN978-0-7695-2908-0.
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Adler, Aviv; Daskalakis, Constantinos; Demaine, Erik D. (2016). Chatzigiannakis, Ioannis; Mitzenmacher, Michael; Rabani, Yuval; Sangiorgi, Davide (eds.). "The Complexity of Hex and the Jordan Curve Theorem". 43rd International Colloquium on Automata, Languages, and Programming (ICALP 2016). Leibniz International Proceedings in Informatics (LIPIcs). 55. Dagstuhl, Germany: Schloss Dagstuhl–Leibniz-Zentrum fuer Informatik: 24:1–24:14. doi:10.4230/LIPIcs.ICALP.2016.24. ISBN978-3-95977-013-2.
Gale, David (December 1979). "The Game of Hex and the Brouwer Fixed-Point Theorem". The American Mathematical Monthly. 86 (10): 818–827. doi:10.2307/2320146. ISSN0002-9890. JSTOR2320146.
Nguyen, Phuong; Cook, Stephen A. (2007). "The Complexity of Proving the Discrete Jordan Curve Theorem". 22nd Annual IEEE Symposium on Logic in Computer Science (LICS 2007). IEEE. pp. 245–256. arXiv:1002.2954. doi:10.1109/lics.2007.48. ISBN978-0-7695-2908-0.
Johnson, Dale M. (1977). "Prelude to dimension theory: the geometrical investigations of Bernard Bolzano". Archive for History of Exact Sciences. 17 (3): 262–295. doi:10.1007/BF00499625. MR0446838. See p. 285.
Adler, Aviv; Daskalakis, Constantinos; Demaine, Erik D. (2016). Chatzigiannakis, Ioannis; Mitzenmacher, Michael; Rabani, Yuval; Sangiorgi, Davide (eds.). "The Complexity of Hex and the Jordan Curve Theorem". 43rd International Colloquium on Automata, Languages, and Programming (ICALP 2016). Leibniz International Proceedings in Informatics (LIPIcs). 55. Dagstuhl, Germany: Schloss Dagstuhl–Leibniz-Zentrum fuer Informatik: 24:1–24:14. doi:10.4230/LIPIcs.ICALP.2016.24. ISBN978-3-95977-013-2.
Gale, David (December 1979). "The Game of Hex and the Brouwer Fixed-Point Theorem". The American Mathematical Monthly. 86 (10): 818–827. doi:10.2307/2320146. ISSN0002-9890. JSTOR2320146.
Gale, David (December 1979). "The Game of Hex and the Brouwer Fixed-Point Theorem". The American Mathematical Monthly. 86 (10): 818–827. doi:10.2307/2320146. ISSN0002-9890. JSTOR2320146.