In D. G. Reed (ed.
"Under a Green Sky: Global Warming, the Mass Extinctions of the Past, and What They Can Tell Us About Our Future" (2007) ISBN 978-0-06-113792-1* Stojanowski, J.S., 2008, "The Gravity Theory Of Mass Extinction: A new unified theory of mass extinction explains the rise and fall of the dinosaurs", ISBN 978-0-9819221-0-2==Zunanje povezave==* Calculate the effects of an Impact* The Current Mass Extinction Event* Species Alliance (nonprofit organization producing a documentary about Mass Extinction titled "Call of Life: Facing the Mass Extinction)* American Museum of Natural History official statement on the current mass extinction* Interstellar Dust Cloud-induced Extinction Theory* Extinction Level Event in short* The Extinction Website* Nasa's Near Earth Object Program* Fossils Suggest Chaotic Recovery from Mass Extinction – LiveScience.com* Sepkoski's Global Genus Database of Marine Animals – Calculate extinction rates for yourself!