TY - CPAPER KW - Invited AU - Lucia Reining BT - ICTP INFM-DEMOCRITOS ISMO - IUT School and workshop on Electronic-structure calculations and their applications in materials science, Isfahan (Iran) DA - 05 PY - 2005 T2 - ICTP INFM-DEMOCRITOS ISMO - IUT School and workshop on Electronic-structure calculations and their applications in materials science, Isfahan (Iran) TI - How to describe exchange and correlation effects in the response properties of valence electrons? ER -