Observational constraints of modified Chaplygin gas in loop quantum cosmology Shuvendu Chakraborty, Ujjal Debnath and Chayan Ranjit Eur. Phys. J. C, 72 8 (2012) 2101 Published online: 10 August 2012 DOI: 10.1140/epjc/s10052-012-2101-3