Extended parameterisations for MSTW PDFs and their effect on lepton charge asymmetry from W decaysA. D. Martin, A. J. Th. M. Mathijssen, W. J. Stirling, R. S. Thorne, B. J. A. Watt and G. WattEur. Phys. J. C, 73 2 (2013) 2318DOI: https://doi.org/10.1140/epjc/s10052-013-2318-9