อ้างอิง ของ คริสต์สหัสวรรษที่_4

  1. ↑ "Irreversible Warming Will Cause Sea Levels to Rise for Thousands of Years to Come, New Research Shows". Science Daily.
  2. ↑ "This Camera Will Capture a 1,000-Year Exposure That Ends in 3015 for History's Slowest Photo". PetaPixel. สืบค้นเมื่อ 2015-12-14.
  3. ↑ Kennedy, Andrew (July 2006). "Interstellar Travel: The Wait Calculation and the Incentive Trap of Progress". Journal of the British Interplanetary Society (JBIS). 59 (7): 239–246.
  4. ↑ Conception Official Zeitpyramide website, accessed: 14 December 2010
  5. ↑ Tzedakis, P.C.; และคณะ (2012). "Determining the natural length of the current interglacial". Nature Geoscience. 5 (2): 138–141.