1Bonk, Curtis; Zhang, Ke.Introducing the R2D2 Model:Online Learning for the Diverse Learners of this World [J].Distance Education, 2008, (27):249-264.
2Ard W. Lazonder, Pascal Wilhelm , Mieke G. Hagemans. The Influence of Domain Knowledge on Strategy Use During Simulation- based Inquiry Learning[J]. Learning and Instruction, 2008, (18) : 580-592.
6Zehra Akyola, D. Randy Garrison,M. Yasar Ozdena. Development of a Community of Inquiry in Online and Blended Learning Contexts [J].Proeedia Social and Behavioral Sciences.2009, (1) : 1834-1838.