Drag force of moving quark in STU background J. Sadeghi, M. R. Setare, B. Pourhassan and S. Hashmatian Eur. Phys. J. C, 61 3 (2009) 527-533 Published online: 08 April 2009 DOI: 10.1140/epjc/s10052-009-1011-5