@INPROCEEDINGS{Det_05,
   AUTHOR      = {Alin Deutsch and Yannis Katsis and Yannis Papakonstantinou},
   TITLE       = {Determining source contribution in integration systems},
   BOOKTITLE   = {ACM SIGMOD/PODS 2005 Conference},
   YEAR        = {2005},
   MONTH       = {June},
   ADDRESS     = {Baltimore, Maryland},
   URL         = {http://dimacs.rutgers.edu/~graham/pubs/papers/multigraph.pdf},
}