Semiclassical strings in supergravity PFT Aritra Banerjee, Sagar Biswas and Kamal L. Panigrahi Eur. Phys. J. C, 74 10 (2014) 3115 Published online: 17 October 2014 DOI: 10.1140/epjc/s10052-014-3115-9