The Leiden ranking 2011/2012: Data collection, indicators, and interpretationJournal of the American Society for Information Science and Technology
Volume 63, Issue 12, December 2012, Pages: 2419–2432, Ludo Waltman, Clara Calero-Medina, Joost Kosten, Ed C.M. Noyons, Robert J.W. Tijssen, Nees Jan van Eck, Thed N. van Leeuwen, Anthony F.J. van Raan, Martijn S. Visser and Paul Wouters
Article first published online : 6 NOV 2012, DOI: 10.1002/asi.22708