Prospects for observation of double parton scattering with four-muon final states at LHCb C.H. Kom, A. Kulesza and W.J. Stirling Eur. Phys. J. C, 71 11 (2011) 1802 Published online: 19 November 2011 DOI: 10.1140/epjc/s10052-011-1802-3