Ballard, H. L., Dixon, C. G., & Harris, E. M. (2017). Youth-focused citizen science: Examining the role of environmental science learning and agency for conservation. Biological Conservation, 208, 65-75.
Cornell Lab of Ornithology, 4-H, and Citizen Science Association. (2016). Citizen Science: Activating STEM Learning Out of School. http://citizenscience.org/wp-content/uploads/2017/05/AfterSchoolSTEM-170510.pdf
Devictor, V., Whittaker, R. J., & Beltrame, C. (2010). Beyond scarcity: citizen science programmes as useful tools for conservation biogeography. Diversity and distributions, 16(3), 354-362.
Khatib, F., DiMaio, F., Cooper, S., Kazmierczyk, M., Gilski, M., Krzywda, S., … & Jaskolski, M. (2011). Crystal structure of a monomeric retroviral protease solved by protein folding game players. Nature structural & molecular biology, 18(10), 1175-1177.
Kuchner, M. J., Silverberg, S. M., Bans, A. S., Bhattacharjee, S., Kenyon, S. J., Debes, J. H., … & McElwain, M. (2016). Disk Detective: Discovery of New Circumstellar Disk Candidates through Citizen Science. The Astrophysical Journal, 830(2), 84.
National Advisory Council for Environmental Policy and Technology. (2016). Environmental Protection Belongs to the Public: A Vision for Citizen Science at EPA. EPA 219-R-16-001. https://www.epa.gov/faca/nacept-2016-report-environmental-protection-belongs-public-vision-citizen-science-epa
(and this is barely scratching the surface!)