Holographic Λ(t)CDM model in a non-flat universe Jing-Fei Zhang, Yang-Yang Li, Ying Liu, Sheng Zou and Xin Zhang Eur. Phys. J. C, 72 7 (2012) 2077 Published online: 18 July 2012 DOI: 10.1140/epjc/s10052-012-2077-z