@INPROCEEDINGS { Langevin9,
author = {  Langevin, Philippe  },
title  = {  A new class of two weight codes  },
booktitle = {  Finite Fields and Applications  },
pages = {  181--187  },
publisher = {  Cambridge, university press  },
series  = {  London Mathematical Society Lecture Note Series  },
volume  = {  233  },
year = {1996},
rang = {B},
}