1Beril CEYLAN,Birim BALCI,Mustafa Murat INCEOGLU.An ap- plication of creating and packaging learning objects [J]. Proce- dia - Social and Behavioral Sciences, 2009, ( 1 ) :2051-2056.
2]Daniel Churchill. Towards a useful classification of learning ob- jects[J]. Education Tech Reasearch dev(2007)55:479-497.