@article{  
   author = {P. Baldi, C. Lopes},
   title = {The Universal Campus: An Open 3D Virtual World Infrastructure for Research and Education.},
   journal = {ACM eLearn Magazine},
   volume = {2012},
   number = {4},
   pages = {6},
   note = {},
   abstract = {},
   keywords = {},
   year = {2012}
}