Interacting Ricci dark energy in scalar Gauss-Bonnet gravity Surajit Chattopadhyay, Antonio Pasqua and Ayman A. Aly Eur. Phys. J. Plus, 129 2 (2014) 31 Published online: 19 February 2014 DOI: 10.1140/epjp/i2014-14031-5