@article{PT77,
AUTHOR = {Paul, W.J. and Tarjan, R.E.},
TITLE = {Time-Space Trade-Offs in a Pebble Game},
VOLUME = {52},
YEAR = {1977},
PAGES = {365--369.},
URL = {http:///publikationen/PT77.pdf},
SERIES = {Lecture Notes in Computer Science},
BOOKTITLE = {Proc. 4th ICALP},
PUBLISHER = {Springer},
EE = {http://www.springerlink.de/content/y36841983l45g85j/},
}