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