Link services or link agents?

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\begin{bibtex} @inproceedings{DBLP:conf/ht/CarrHH98, ee={db/conf/ht/CarrHH98.html}, title={Link services or link agents?}, pages={113-122}, cdrom={HT1998/P113.pdf}, year={1998}, crossref={DBLP:conf/ht/98}, booktitle={Hypertext}, ee={http://doi.acm.org/10.1145/276627.276640}, url={http://www.informatik.uni-trier.de/~ley/db/conf/ht/ht98.html#CarrHH98}, author={Les Carr and Wendy Hall and Steve Hitchcock} }\end{bibtex}