% Cite as \cite{pebblegame}.  For completeness, please include both of these entries in your
% bibliography.
@ARTICLE {pebblegame,
title = {Pebble Game Algorithms and Sparse Graphs},
author = {Lee, Audrey and Streinu, Ileana},
journal = {Discrete Mathematics},
year = {2008},
volume = {308},
number = {8},
pages = {1425--1437},
note = {A previous version appeared as \cite{pebblegame:eurocomb}.} 
}

@INPROCEEDINGS {pebblegame:eurocomb,
title = {Pebble Game Algorihms and $(k,l)$-sparse graphs},
author = {Lee, Audrey and Streinu, Ileana},
booktitle = {2005 European Conference on Combinatorics, Graph Theory and Applications (EuroComb '05)},
series = {DMTCS Proceedings},
year = {2005},
month = {September},
pages = {181--186},
publisher = {Discrete Mathematics and Theoretical Computer Science},
address = {Berlin},
note = {\url{http://www.dmtcs.org/proceedings/html/dmAE0136.abs.html}},
keywords = {pebble game, rigidity, sparse graph},
}