Lee, Doris Jung-Lin, Joanne Lo, Moonhyok Kim, and Eric Paulos. 2016. “Crowdclass: Designing Classification-Based Citizen Science Learning Modules”. Proceedings of the AAAI Conference on Human Computation and Crowdsourcing 4 (1):109-18. https://doi.org/10.1609/hcomp.v4i1.13273.