H.E.S.S. observations of the Crab during its March 2013 GeV gamma-ray flare - Abramowski, Attila; Zacharias, Michael; Becherini, Yvonne; Cologna, Gabriele; Jankowsky, Felix; Kaufmann, Sarah; Mohamed, Mahmoud; Quirrenbach, Andreas; Schwemmer, Stephanie; Wagner, Stefan (Astronomy and astrophysics, 2014)