Dallmeier-Tiessen, S., Darby, R., Goerner, B., Hyppoloelae, J., Igo-Kemenes, P., Kahn, D., et al. (2011). Highlights from the SOAP project survey. What scientists think about Open Access publishing. Retrieved January, 15, 2015, from http://arxiv.org/ftp/arxiv/papers/1101/1101.5260.pdf.
Frass, W., Cross, J., & Gardner, V. (2014). Taylor & Francis open access survey. Abingdon: Routledge, Taylor & Francis Group. Retrieved January 15, 2015, from http://www.tandf.co.uk/journals/explore/open-access-survey-june2014.pdf.
Ware, M., & Mabe, M. (2012). The STM report: An overview of scientific and scholarly journal publishing. The Hague: International Association of Scientific, Technical and Medical Publishers. Retrieved January 15, 2015, from http://www.stm-assoc.org/2012_12_11_STM_Report_2012.pdf.