Dongdai Zhou Zhuo Zhang Shaochun Zhong Pan Xie The Design of Software Architecture for E-Learning Platforms. 32-40 2008 Edutainment http://dx.doi.org/10.1007/978-3-540-69736-7_4 conf/edutainment/2008 db/conf/edutainment/edutainment2008.html#ZhouZZX08