Abstract
Paper presented at the IFLA Satellite Preconference: Open Access to Science Information; Trends, Models and Strategies for Libraries, Chania, Crete, Greece. Aug. 6-8, 2010. This paper is published as a chapter in the DeGruyter monograph entitled: Open Access to STM Information: Trends, Models and Strategies for Libraries. Edited by Anthi Katsirikou, Berlin/Munich: De Gruyter Saur, 2011, pp. 29-38.(IFLA Publications; Nr. 153)