Tham khảo Methan hydrat

  1. US Geological Survey, Gas hydrate: What is it?, accessed ngày 27 tháng 2 năm 2010.
  2. Roald Hoffmann (2006). “Old Gas, New Gas”. American Scientist. 94 (1): 16–18.
  3. Gas (Methane) Hydrates -- A New Frontier, USGS fact sheet
  4. Lüthi, Dieter; Le Floch, M; Bereiter, B; Blunier, T; Barnola, JM; Siegenthaler, U; Raynaud, D; Jouzel, J; Fischer, H (2008). “High resolution carbon dioxide concentration record 650,000–800,000 years before present”. Nature. 453 (7193): 379–382. Bibcode:2008Natur.453..379L. doi:10.1038/nature06949. PMID 18480821.