@inproceedings{KEOD-2011-YamasakiS,
	author        = "Susumu Yamasaki and Mariko Sasakura",
	booktitle     = "{Proceedings of the Third International Conference on Knowledge Engineering and Ontology Development}",
	isbn          = "978-989-8425-80-5",
	pages         = "466--469",
	publisher     = "{SciTePress}",
	title         = "{A Graph Manipulation System Abstracted from e-Learning}",
	year          = 2011,
}