Paper by Richard W. Boss, updated in December 2008, which goes into detail about the ins and outs of open source software and includes some case studies.
Eine Untersuchung über Kosten und Leistungsfähigkeit open-source basierter Bibliothekssysteme im Vergelich zu kommerziellen von 2005. Untersucht wurden: OpenBiblio, Koha, PHP MyLibrary, PHP Library, PMB, Emilda
([17]), Avanti ([18]). Der Einsatz ist bibliotheksabh¨angig
"The end product will be a design document to inform open source library system development efforts, to guide future library system implementations, and to influence current Integrated Library System vendor products."
At the University of East Anglia (UEA), we have been taking part in the Primo Charter Programme in which various libraries in the Europe and the US have been able to work with Ex Libris on version 1 of their Primo product.