Spin-transport in multi-terminal normal metal-ferromagnet systems with non-collinear magnetizations A. Brataas, Y. V. Nazarov and G. E.W. Bauer Eur. Phys. J. B, 22 1 (2001) 99-110 Published online: 15 July 2001 DOI: 10.1007/PL00011139