Vetenskapsåret 1991
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Fotnoter
- ^ [a b] Så funkar universum, James Muirden
- ^ Pope, Kevin O. et al. (9 maj 1991). ”Mexican site for K/T impact crater?”. Nature "351": s. 105. http://www.nature.com/nature/journal/v351/n6322/pdf/351105a0.pdf.
- ^ Hildebrand, Alan R.; Penfield, Glen T.; Kring, David A.; Pilkington, Mark; Zanoguera, Antonio Camargo; Jacobsen, Stein B.; Boynton, William V. (9 november 1991). ”Chicxulub Crater: a possible Cretaceous/Tertiary Boundary impact crater on the Yucatán Peninsula, Mexico”. Geology "19" (9): ss. 867–871. doi:10.1130/0091-7613(1991)019<0867:CCAPCT>2.3.CO;2. http://geology.gsapubs.org/content/19/9/867.full.pdf+html.
- ^ Schulte, Peter et al. (9 november 2010). ”The Chicxulub Asteroid Impact and Mass Extinction at the Cretaceous- Paleogene Boundary”. Science "327": ss. 1214–1218. doi:10.1126/science.1177265. PMID 20203042. http://www.sciencemag.org/content/327/5970/1214.full.pdf.
- ^ ”Geological Society”. Arkiverad från originalet den 5 juni 2011. https://web.archive.org/web/20110605101836/http://www.geolsoc.org.uk/gsl/society/history/page753.html. Läst 13 april 2011.
- ^ ”Nobelpriset”. http://nobelprize.org/nobel_prizes/lists/all/index.html. Läst 10 april 2011.
- ^ ”Geological Society”. Arkiverad från originalet den 5 juni 2011. https://web.archive.org/web/20110605102217/http://www.geolsoc.org.uk/gsl/society/history/page750.html. Läst 14 april 2011.
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