@ARTICLE{
author={Jovanovic Jelena M,Gasevic Dragan,Torniai Carlo,Bateman Scott,Hatala Marek},
year={2009},
title={The Social Semantic Web in Intelligent Learning Environments: state of the art and future challenges},
journal={INTERACTIVE LEARNING ENVIRONMENTS},
volume={17},
number={4},
pages={273-309},
document_type={Article},
} 

@ARTICLE{
author={Jovanovic Jelena M,Torniai Carlo,Gasevic Dragan,Bateman Scott,Hatala Marek},
year={2008},
title={Leveraging the social semantic web in Intelligent Tutoring Systems},
journal={INTELLIGENT TUTORING SYSTEM, PROCEEDINGS},
volume={5091},
number={},
pages={563-572},
document_type={Proceedings Paper},
}