You can find L'Atelier in these guides :

¬  Gault & Millau 2009
    Read (french)
¬  Michelin
¬  Ballarin
    Read (french)
    L'hotellerie-restauration (french)
¬  Pudlowski

¬  Louis Vuitton
    Read (french)
¬  Le petit futé
¬  Le guide du routard