TY - CPAPER KW - Invited AU - Lucia Reining BT - Workshop and School Time-Dependent Density-Functional Theory: Prospects and Applications , Benasque (Spain) DA - 08-09 PY - 2004 T2 - Workshop and School Time-Dependent Density-Functional Theory: Prospects and Applications , Benasque (Spain) TI - How to describe exchange and correlation effects in the response properties of valence electrons? Answers from TDDFT and Many-Boby Perturbation Theory ER -