Bosman, J., & Kramer, B. (2018). Open access levels: A quantitative exploration using Web of Science and oaDOI data. PeerJ Preprints, 6, e3520v1. https://doi.org/10.7287/ peerj.preprints.3520v1 .

ESAC. (n.d.). Transformative agreements. Efficiency and standards for article charges. Retrieved June 23, 2019, from https://esac-initiative.org/about/ transformative-agreements .

INTACT. (2015). Transparent infrastructure for article charges. Retrieved June 23, 2019, from https://www.intact-project.org/ .

Kramer, B., & Bosman, J. (2018). Open Access levels of Dutch universities’ output 2016– 2017 (articles & reviews): Green, gold, hybrid and bronze – May 2018 (Version v 2.1) [Data set] http://doi.org/10.5281/zenodo.1251569 .

Morais, R., & Borrell-Damián, L. (2019). 2017–2018 EUA open access survey results. European University Association. Retrieved June 23, 2019, from https://eua.eu/ resources/publications/826:2017-2018-eua-open-access-survey-results.html .

Pinowar, H., Priem, J., Larivière, V., Alperin, J. P., Matthias, L., Norlander, B., …, Haustein, S. (2018). The state of OA: A large-scale analysis of the prevalence and impact of open access articles. PeerJ, 6, e4375. https://doi.org/10.7717/peerj.4375 .

Rovira, A., & Labastida, I. (2018). The Open Access Observatory. Communication at the 47th LIBER Annual Conference, Lille, France. [Slides] https://doi.org/10.5281/ zenodo.1305999 .

UAB. (2019). Open research thermometer in the UAB. Retrieved June 23, 2019, from https://www.uab.cat/web/research/open-access-uab/open-research-thermometer in-the-uab-1345746029908.html .

UB. (2019). Open access thermometer at the University of Barcelona. Retrieved June 23, 2019, from https://crai.ub.edu/en/crai-services/open-access-ub/thermometer-data .

Universitat de Barcelona. (2011). The University of Barcelona’s open access policy. Retrieved June 23, 2019, from http://hdl.handle.net/2445/27711 .

Universitat de Barcelona. (2019). University of Barcelona funding for open access publishing (2010). Retrieved June 23, 2019, from http://crai.ub.edu/en/crai-services/ open-access-ub/funding/ub .

Universitat Politècnica de Catalunya. (2009). Open access institutional policy: Access, visibility, impact and preservation of the academic production of the UPC. Retrieved June 23, 2019, from https://bibliotecnica.upc.edu/sites/default/files/pagines_generals/ investigadors/politicainstitucional_english.pdf .

Universitat Politècnica de Catalunya. (2014). Approval for awarding research activity points solely for open access publications. Retrieved June 23, 2019, from https:// bibliotecnica.upc.edu/sites/default/files/pagines_generals/coneix/punts-par-eng. pdf .

Universities UK. (2017). Monitoring the transition to Open Access. Jubb Consulting. Retrieved June 23, 2019, from https://www.universitiesuk.ac.uk/policy-and analysis/reports/Documents/2017/monitoring-transition-open-access-2017.pdf .

UPC. (2019a). Observatory of open access. Retrieved June 23, 2019, from https:// bibliotecnica.upc.edu/en/observatori .

UPC. (2019b). Thermometer open access UPC. Retrieved June 23, 2019, from https:// bibliotecnica.upc.edu/en/investigadors/acces-obert/termometre-acces-obert-upc .

UPF. (2018). Publicar en accés obert. Retrieved June 23, 2019, from https://guiesbibtic. upf.edu/acces-obert/setmana-AO18#s-lg-box-wrapper-17457133 .