Renormalisation of composite operators in lattice perturbation theory with clover fermions: non-forward matrix elementsM. Göckeler, R. Horsley, H. Perlt, P.E.L. Rakow, A. Schäfer, G. Schierholz and A. SchillerEur. Phys. J. C, 48 2 (2006) 523-530DOI: https://doi.org/10.1140/epjc/s10052-006-0031-7