Dongsik Kim KwanSun Choi Sunheum Lee Changwan Jeon Jiyoon Yoo Implementation of a Web-Based Hybrid Educational System for Enhancing Learning Efficiency of Engineering Experiments. 357-368 2007 conf/edutainment/2007 Edutainment http://dx.doi.org/10.1007/978-3-540-73011-8_36 db/conf/edutainment/edutainment2007.html#KimCLJY07