@article{DBLP:journals/interactions/ShneidermanM97,
author = {Ben Shneiderman and
Pattie Maes},
title = {Direct manipulation vs. interface agents},
journal = {Interactions},
volume = {4},
number = {6},
year = {1997},
pages = {42-61},
ee = {http://doi.acm.org/10.1145/267505.267514},
bibsource = {DBLP, http://dblp.uni-trier.de}
}