Patterson, G., Van Horn, G., Belongie, S., Perona, P. and Hays, J. (2015) “Tropel: Crowdsourcing Detectors with Minimal Training”, Proceedings of the AAAI Conference on Human Computation and Crowdsourcing, 3(1), pp. 150-159. doi: 10.1609/hcomp.v3i1.13224.