The IBEX ribbon as a signature of the inhomogeneity of the local interstellar medium Horst Fichtner, Klaus Scherer, Frederic Effenberger, Jochen Zönnchen, Nathan Schwadron and David J. McComas A&A, 561 (2014) A74 Published online: 03 January 2014 DOI: 10.1051/0004-6361/201322064