@inproceedings{BDFP83, <br>AUTHOR = {Borodin, A. and Dolev, D. and  Fich, F. and Paul, W.J.},<br>TITLE = {Bounds for Width-Two Branching Programs},<br>YEAR = {1983},<br>PAGES = {87--93}, <br>BOOKTITLE = {Proc. 15th ACM-STOC }, <br>EE = {http://portal.acm.org/citation.cfm?id=800061.808736&coll=ACM&dl=ACM&CFID=87041108&CFTOKEN=61555889},<br>}