@article{PT78,
AUTHOR = {Paul, W.J. and Tarjan, R.E.},
TITLE = {Time-Space Trade-Offs in a Pebble Game},
VOLUME = {10},
YEAR = {1978},
PAGES = {111--115},
SERIES = {Acta Informatica 1978},
EE = {http://www.springerlink.com/content/rq90v3u24j842105/},
}