A multiwavelength view of the flaring state of PKS 2155-304 in 2006 - Abramowski, Attila; Cologna, Gabriele; Hauser, Marcus; Kaufmann, Sarah; Lenain, Jean-Philippe; Quirrenbach, Andreas; Schwemmer, Stephanie; Wagner, Stefan; Zacharias, Michael (Astronomy and astrophysics, 2012)