@article { dolog-06b,
	title = {Interoperability in Personalized Adaptive Learning},
	journal = {Educational Technology and Society Journal},
	volume = {9},
	number = {2},
	year = {2006},
	month = {apr},
	URL = {http://www.ifets.info/journals/9_2/2.pdf},
	author = {Lora Aroyo and Peter Dolog and Geert-Jan Houben and Ambjoern Naeve and Mikael Nilson and Fridolin Wild}
}