@article{davisjla,
	author          = {Davis, Dan and Kizilcec, Rene and Hauff, Claudia and Houben, Geert-Jan},
	title           = {Scaling Effective Learning Strategies: Retrieval Practice and Long-Term Knowledge Retention in MOOCs},
	journal         = {Journal of Learning Analytics},
	year            = {2018},
	group           = {WIS}
}