@conference { PLci01b,
author = {   Langevin, Philippe   },
title  = {   Non-linearity of power functions   },
booktitle = {   AGCT-8   },
note   = {   Conf\'erencier invit\'e.   },
organization = {   IML   },
address = {   Luminy, France   },
year = {2001},
rang = {I},
}