Sergey A. Sosnovsky Peter Brusilovsky Michael Yudelson Antonija Mitrovic Moffat Mathews Amruth N. Kumar Semantic Integration of Adaptive Educational Systems. 134-158 2009 Advances in Ubiquitous User Modelling http://dx.doi.org/10.1007/978-3-642-05039-8_8 series/lncs/5830 db/series/lncs/lncs5830.html#SosnovskyBYMMK09