@conference { PLci01a, author = { Langevin, Philippe }, title = { About the counter-example of {P}atterson et {W}iedeman }, booktitle = { Fq6 }, month = { june }, organization = { Finite Fields and Applications }, address = { Oaxaca, Mexico. }, year = {2001}, rang = {A}, url = {http://langevin.univ-tln.fr/recherche/conference/cpwsld.pdf}, }