1. Ball P (2001) Brimstone pickled Permian. Nature, Science update. http://www.nature.com/nsu/010920/ 010920-6.html
2. Becker L, Poreda RJ, Basu AR, Pope KO, Harrison TM, Nicholson C, Iasky R (2004) Bedout: a possible End-Permian impact crater offshore of Northwestern Australia. Science Express. www.sciencexpress.org
3. Birks JW, Crutzen PJ, Roble RG (2007) Frequent ozone depletion resulting from impacts of asteroids and comets. Chapter 13 of this volume
4. Bottke WF (2007) Understanding the near-Earth object population: the 2004 perspective. Chapter 9 of this volume
5. Bryant E (2004) Geological and cultural evidence for cosmogenic tsunami. Conference Comet/Asteroid Impacts and Human Society. The International Council for Science Workshop, Santa Cruz de Tenerife, Canary Islands, November 30, 2004