Vector dark energy models with quadratic terms in the Maxwell tensor derivatives Zahra Haghani, Tiberiu Harko, Hamid Reza Sepangi and Shahab Shahidi Eur. Phys. J. C, 77 3 (2017) 137 Published online: 28 February 2017 DOI: 10.1140/epjc/s10052-017-4697-9