Extinctions: Cycles of Life and Death Through Time
- Covers patterns and periodicity of extinction, with discussions of major mass extinctions and minor extinction events.
- http://park.org/Canada/Museum/extinction/homepg.html

Extinction
- A number of extinction concepts are discussed and loosely defined, followed by a survey of some important extinction and "extinction-like" events, primarily from the Phanerozoic.
- http://www.peripatus.gen.nz/paleontology/extinction.html

Mass Extinction
- A mathematical model for mass extinction.
- http://www.lassp.cornell.edu/newmme/science/extinction.html

The Late Devonian Mass Extinction
- A professional technical paper discussing whether the Late Devonian (Frasnian-Famennian) mass extinction was initiated by an extraterrestrial impact or an earth-bound event.
- http://www.lpi.usra.edu/meetings/impact2000/pdf/3072.pdf