1. I Foster and C Kesselman (Eds). The Grid: Blueprint for a New Computing Infrastructure. Morgan-Kauffman 1998
2. K G Jeffery. ‘Metadata’ in Brinkkemper, J; Lindencrona, E; Solvberg, A: “Information Systems Engineering” Springer Verlag, London 2000. ISBN 1-85233-317-0.
3. Lect Notes Comput Sci;K. G. Jeffery,1994