Atkinson, M., D. DeRoure, A. Dunlop, G. C. Fox, P. Henderson, T. Hey, N. Paton, S. Newhouse, S. Parastatidis, A. Trafethen, et al., "Web Service Grids: An Evolutionary Approach" Concurrency & Computation: Practice and Experience, vol. 17, no. 2-4, pp. 377-389, Feb 07 2005, http://dx.doi.org/10.1002/cpe.936, http://grids.ucs.indiana.edu/ptliupages/publications/WebServiceGrids.pdf.