@inproceedings{PLATEAU-2014-KoitzS,
	author        = "Roxane Koitz and Wolfgang Slany",
	booktitle     = "{Proceedings of the Fifth Workshop on Evaluation and Usability of Programming Languages and Tools}",
	doi           = "10.1145/2688204.2688209",
	isbn          = "978-1-4503-2277-5",
	pages         = "21--30",
	publisher     = "{ACM}",
	title         = "{Empirical Comparison of Visual to Hybrid Formula Manipulation in Educational Programming Languages for Teenagers}",
	year          = 2014,
}