Hector Garcia-Molina Steven P. Ketchpel Narayanan Shivakumar Safeguarding and Charging for Information on the Internet. 182-189 ICDE98/P182.pdf 1998 ICDE db/conf/icde/icde98.html#Garcia-MolinaKS98 conf/icde/98 http://doi.ieeecomputersociety.org/10.1109/ICDE.1998.655776 journals/ibmsj/PeiroASW98 ... conf/sigmod/BrinDG95 journals/cacm/Chaum85 ... ... ... ... conf/pdis/Garcia-MolinaGS96 ... ... conf/sigmod/GravanoGT94 ... ... ... conf/dl/KetchpelGP97 ... ... ... ... ... ... ... ... journals/csur/PopekK79 ... ... ... ... conf/dl/ShivakumarG95 conf/dl/ShivakumarG96 ... conf/sigmod/ShivakumarG97 conf/vldb/ShivakumarGC98 ... conf/compcon/SirbuT95 ... ... ... ...