TY - CPAPER KW - Invited AU - Lucia Reining BT - Ninth International Workshop on Computational Materials Science: Electronic Structure Theory and Simulations, Trieste (Italy) DA - 01/14-16 PY - 1999 T2 - Ninth International Workshop on Computational Materials Science: Electronic Structure Theory and Simulations, Trieste (Italy) TI - Some remarks about the ab initio calculation of local field and excitonic effects in the dielectric function ER -