R. Vercammen, J. Hidders, and J. Paredaens. Proc. of the 2nd International Workshop on Database Technologies for Handling XML Information on the Web (DataX 2006), 4254, page 250--263. Munich, Germany, (2006)
M. Fernández, J. Hidders, P. Michiels, J. Siméon, and R. Vercammen. Database and Expert Systems Applications, 16th International Conference, DEXA 2005, Copenhagen, Denmark, August 22-26, 2005, Proceedings, 3588, page 554--563. Copenhagen, Denmark, (2005)