Analytical model of strange star in the low-mass X-ray binary 4U 1820-30 Mehedi Kalam, Farook Rahaman, Sajahan Molla, Md. Abdul Kayum Jafry and Sk. Monowar Hossein Eur. Phys. J. C, 74 7 (2014) 2971 Published online: 29 July 2014 DOI: 10.1140/epjc/s10052-014-2971-7