Piamonteze, C.; Miedema, P.; de Groot, F. M. F. The accuracy of the spin sum rule in XMCD. Journal of Physics: Conference Series 2009, 190, 012015.Piamonteze, C., Miedema, P. S. & de Groot, F. M. F. The accuracy of the spin sum rule in XMCD. J. Phys.: Conf. Ser....