• Concerning invasive species: Reply to Brown and Sax 

      Cassey, P.; Blackburn, T.M.; Duncan, R.P.; Chown, S.L. (BLACKWELL PUBLISHING ASIA, 2005-06)
      Biological invasions have commonly occurred, and to a lesser degree continue to do so, without human assistance. It is, however, a combination of the rate and magnitude, as well as the distances and agency involved, that ...