Alberto Barbosa Raposo,  Léo Pini Magalhães,  Ivan L. Marques Ricarte. 

In order to be effectively used as collaborative work tools, developers of virtual environments should invest, among other aspects, in the coordination of users' activities. The goal of this work is to present coordination mechanisms that may be reused in different implementations of collaborative virtual environments (CVEs).

http://www.lbd.dcc.ufmg.br/colecoes/wrv/2000/0032.pdf

Processando consulta.