Spin-switch effect in a graphene d-wave superconductor spin-valve C. Bai, J.T. Wang, H.X. Tang and Y.L. Yang Eur. Phys. J. B, 84 1 (2011) 83-88 Published online: 31 October 2011 DOI: 10.1140/epjb/e2011-20507-1