8[4]A Short Biography of Alfred James Lotka,prepared by the National Institue of Standards and Technology.http://www.nist.gov/dads/HTML/lotkaslaw.html.
10[6]Carston,R.Informativeness,Relevance and Scalar Implicature[A].Relevance Theory:Applications and Implications[C].Ed.R.Carston & S.Uchida.Amsterdam:John Benjamins,1998.179-236.