@conference { PL2008,
author = {   Langevin, Philippe   },
title  = {   Counting bent functions  },
address = {   Imath (Toulon), maaticah (Paris)   },
year = {2008},
rang = {S},
url  =  {http://langevin.univ-tln.fr/recherche/conference/nbf.pdf},
}