@inproceedings{EDM-2014-AlmondGGW,
	author        = "Russell G. Almond and Ilya M. Goldin and Yuhua Guo and Nan Wang",
	booktitle     = "{Proceedings of the Seventh International Conference on Educational Data Mining}",
	ee            = "http://www.educationaldatamining.org/EDM2014/uploads/procs2014/longpapers/169_EDM-2014-Full.pdf",
	isbn          = "978-0-9839-5254-1",
	pages         = "169--176",
	publisher     = "{International Educational Data Mining Society}",
	title         = "{Vertical and Stationary Scales for Progress Maps}",
	year          = 2014,
}