Heath, R. W.; Lutzer, David J.; Zenor, P. L. (1973). “Monotonically normal spaces”. 《Transactions of the American Mathematical Society》 (영어) 178: 481–493. doi:10.2307/1996713. ISSN0002-9947. MR0372826. Zbl0269.54009.
Steen, Lynn A. (1970). “A direct proof that a linearly ordered space is hereditarily collectionwise normal”. 《Proceedings of the American Mathematical Society》 (영어) 24: 727-728. doi:10.2307/2037311. ISSN0002-9939. MR0257985. Zbl0189.53103.
Heath, R. W.; Lutzer, David J.; Zenor, P. L. (1973). “Monotonically normal spaces”. 《Transactions of the American Mathematical Society》 (영어) 178: 481–493. doi:10.2307/1996713. ISSN0002-9947. MR0372826. Zbl0269.54009.
Steen, Lynn A. (1970). “A direct proof that a linearly ordered space is hereditarily collectionwise normal”. 《Proceedings of the American Mathematical Society》 (영어) 24: 727-728. doi:10.2307/2037311. ISSN0002-9939. MR0257985. Zbl0189.53103.
Heath, R. W.; Lutzer, David J.; Zenor, P. L. (1973). “Monotonically normal spaces”. 《Transactions of the American Mathematical Society》 (영어) 178: 481–493. doi:10.2307/1996713. ISSN0002-9947. MR0372826. Zbl0269.54009.
Steen, Lynn A. (1970). “A direct proof that a linearly ordered space is hereditarily collectionwise normal”. 《Proceedings of the American Mathematical Society》 (영어) 24: 727-728. doi:10.2307/2037311. ISSN0002-9939. MR0257985. Zbl0189.53103.
Heath, R. W.; Lutzer, David J.; Zenor, P. L. (1973). “Monotonically normal spaces”. 《Transactions of the American Mathematical Society》 (영어) 178: 481–493. doi:10.2307/1996713. ISSN0002-9947. MR0372826. Zbl0269.54009.
Steen, Lynn A. (1970). “A direct proof that a linearly ordered space is hereditarily collectionwise normal”. 《Proceedings of the American Mathematical Society》 (영어) 24: 727-728. doi:10.2307/2037311. ISSN0002-9939. MR0257985. Zbl0189.53103.