Quasi-periodic flares in EXO 2030+375 observed with INTEGRAL D. Klochkov, C. Ferrigno, A. Santangelo, R. Staubert, P. Kretschmar, I. Caballero, K. Postnov and C. A. Wilson-Hodge A&A, 536 (2011) L8 Published online: 09 December 2011 DOI: 10.1051/0004-6361/201118185