Alisson Andrade Alba Cristina Magalhaes Alves de Melo A WS-Agreement-Based QoS Auditor Negotiation Mechanism for Grids. 1-8 2011 GRID http://dx.doi.org/10.1109/Grid.2011.10 conf/grid/2011 db/conf/grid/grid2011.html#AndradeM11