1. Ajuntament de Barcelona. (2019).Barcelona digital city: Putting technology at the service of people. https://ajuntament.barcelona.cat/digital/sites/default/files/pla_barcelona_digital_city_in.pdf
2. Bass, T. & Old, R. (2020). (Nesta). https://media.nesta.org.uk/documents/DECODE_Common_Knowledge_Citizen_led_data_governance_for_better_cities_Jan_2020.pdf
3. Benanav, Aaron. (2020b).How to make a pencil. Logic. 20 December 2020. https://logicmag.io/commons/how-to-make-a-pencil/
4. Benthall, S. & Goldenfein, J. (2020). (SSRN).https://ssrn.com/abstract=3632577