@techreport{fuhrer:wp:vwmodel,
 author = {Patrik Fuhrer and Jacques Pasquier-Rocha},
 booktitle = {Internal Working Paper},
 month = {August},
 number = {03-14},
 organization = {Department of Informatics, University of Fribourg, Switzerland},
 pdf = {madModel.pdf},
 title = {Massively Distributed Virtual Worlds: a Formal Approach},
 year = {2003}
}