@inproceedings{Pa81, <br>AUTHOR = {Paul, W.J.},<br>TITLE = {On Heads Versus Tapes},<br>YEAR = {1981},<br>PAGES = {68--73}, <br>URL = {http:///publikationen/Pa81.pdf}, <br>BOOKTITLE = {Proc. 22nd IEEE-FOCS}, <br>EE = {http://doi.ieeecomputersociety.org/10.1109/SFCS.1981.25},<br>}