1. Brabham, D.C., 2009. Crowdsourcing the public participation process for planning projects. Planning Theory, 8(3), pp.242-262.

2. Heipke, C., 2010. Crowdsourcing geospatial data. ISPRS Journal of Photogrammetry and Remote Sensing, 65(6), pp.550-557.

3. Zanatta, A.L., Steinmacher, I., Machado, L.S., de Souza, C.R. and Prikladnicki, R., 2017. Barriers faced by newcomers to software-crowdsourcing projects. IEEE Software, 34(2), pp.37-43.

 

4. OpenStreetMap

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5. Keenan Mandela Gezbe, 2017. The positional accuracy of crowdsourced geographic data from open source web GIS. International Symposium on Geoinformatics (ISyG)

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6.  Bob Bradley, 2017. How crowdsourcing tools are building more powerful maps.

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7. https://www.giscloud.com/blog/using-crowdsourcing-to-restore-the-historical-city-center-of-mantova-italy-case-study/