A Meta Data Model for Distributed Library Systems: Building a Magic Mirror (XML/RDF) for RDBs. - Frank Klaproth; Winfried Muehl; Ralf Schimmer (ADL, 1999)

Income sources as underlying business models' attributes for scholarly journals: preliminary findings from analysing open access journals data. - Panayiota Polydoratou; Ralf Schimmer (ELPUB, 2010)

Open Access Publishing: An Initial Discussion of Income Sources, Scholarly Journals and Publishers. - Panayiota Polydoratou; Margit Palzenberger; Ralf Schimmer; Salvatore Mele (ICADL, 2010)

First results of the SOAP project. Open access publishing in 2010 - Suenje Dallmeier-Tiessen; Robert Darby; Bettina Goerner; Jenni Hyppoelae; Peter Igo-Kemenes; Deborah Kahn; Simon C. Lambert; Anja Lengenfelder; Chris Leonard; Salvatore Mele; Panayiota Polydoratou; David Ross; et al. (CoRR, 2010)

Highlights from the SOAP project survey. What Scientists Think about Open Access Publishing - Suenje Dallmeier-Tiessen; Robert Darby; Bettina Goerner; Jenni Hyppoelae; Peter Igo-Kemenes; Deborah Kahn; Simon C. Lambert; Anja Lengenfelder; Chris Leonard; Salvatore Mele; Malgorzata Nowicka; Panayiota Polydoratou; et al. (CoRR, 2011)

Open access journals - what publishers offer, what researchers want. - Suenje Dallmeier-Tiessen; Robert Darby; Bettina Goerner; Jenni Hyppoelae; Peter Igo-Kemenes; Deborah Kahn; Simon C. Lambert; Anja Lengenfelder; Chris Leonard; Salvatore Mele; Malgorzata Nowicka; Panayiota Polydoratou; et al. (Inf. Serv. Use, 2011)

Open Access in Zahlen: Der Umbruch in der Wissenschaftskommunikation als Herausforderung für Bibliotheken. - Ralf Schimmer; Kai Geschuhn; Margit Palzenberger (ZfBB, 2013)

The transformation of scientific journal publishing: Open access after the Berlin 12 Conference. - Ralf Schimmer (Inf. Serv. Use, 2017)