J. König, J. Schliemann, T. Jungwirth, and A.H. MacDonald, "Ferromagnetism in (III,Mn)V semiconductors", in Electronic Structure and Magnetism of Complex Materials, ed. D.J. Singh and D.A. Papaconstantopoulos, Springer Verlag, Berlin, 163 (2003), preprint arXiv:cond-mat/0111314: on-line