Ranking Web of World Universities
Shangai Jiao Tong University
Higher Education Evaluation and Accreditation Council of Taiwan
The Leiden Rankings
Times Higher Education Supplement: the top 200 universities
Ranking of Excellent European Graduate Programmes. Centre for Higher Education Development (CHE) 2009
Scimago Research Group
Ibero-American Ranking SIR 2011
THE QS World University Ranking