@conference {16955, title = {Agents vs. direct manipulation: what{\textquoteright}s best to disentangle the Web?}, booktitle = {Proceedings of the eighth international conference on World Wide Web}, year = {1999}, month = {1999///}, author = {S{\'a}nchez,J.A. and Etzioni,O. and Kautz,H. and Lieberman,H. and Shneiderman, Ben} }