J. Hidders, J. Paredaens, R. Vercammen, and S. Demeyer. Proceedings of Second International XML Database Symposium, volume 3186 of Lecture Notes in Computer Science, page 5-20. Toronto, Canada, Springer-Verlag, (August 2004)
M. Gemis, J. Paredaens, P. Peelman, and J. den Bussche. Proc. of the International Workshop on Graph Transformations in Computer Science, 776, page 170--187. Dagstuhl Castle, Germany, (January 1993)
M. Andries, J. Paredaens, and J. den Bussche. Proc. of the Second Far-East Workshop on Future Database Systems, 3, page 276--285. Kyoto, Japan, (April 1992)