@inproceedings{SIGITE-2007-ChaKL,
	author        = "SeungEun Cha and DaiYoung Kwon and Won-Gyu Lee",
	booktitle     = "{Proceedings of the Eighth Conference on Information Technology Education, SIGITE 2007, Destin, Florida, USA, October 18-20, 2007}",
	doi           = "10.1145/1324302.1324331",
	isbn          = "978-1-59593-920-3",
	pages         = "135--140",
	publisher     = "{ACM}",
	title         = "{Using puzzles: problem-solving and abstraction}",
	year          = 2007,
}