L. Rodrigues, and P. Ver\'ıssimo. Proceedings of the 11th Symposium on Reliable Distributed Systems, page 112-121. Houston, Texas, IEEE Computer Society Press, (1992)
P. Ver\'ıssimo, and L. Rodrigues. Proceedings of the Third Workshop on Future Trends of Distributed Computing Systems, page 57-63. Taipei, Taiwan, IEEE Computer Society Press, (1992)
P. Ver\'ıssimo, and W. Vogels. Proceedings of the Fourth Workshop on Future Trends of Distributed Computing Systems, page 119-127. Lisbon, Portugal, IEEE Computer Society Press, (1993)