Inproceedings (gottlobetal2004)
Gottlob, G.; Koch, C.; Baumgartner, R.; Herzog, M. & Flesca, S.
The Lixto Data Extraction Project - Back and Forth between Theory and Practice
ACM, 2004, 1-12

Article (219403)
Eiter, T. & Gottlob, G.
Identifying the Minimal Transversals of a Hypergraph and Related Problems
SIAM J. Comput., Society for Industrial and Applied Mathematics, 1995, 24, 1278-1304