@article{DBLP:journals/tog/LaViolaZ04,
author = {Joseph J. LaViola Jr. and
Robert C. Zeleznik},
title = {MathPad$^{\mbox{2}}$: a system for the creation and exploration
of mathematical sketches},
journal = {ACM Trans. Graph.},
volume = {23},
number = {3},
year = {2004},
pages = {432-440},
ee = {http://doi.acm.org/10.1145/1015706.1015741},
bibsource = {DBLP, http://dblp.uni-trier.de}
}