@inproceedings{Pa75, <br>AUTHOR = {Paul, W.J.},<br>TITLE = {A 2.5 N-lower Bound on the Combinational Complexity of Boolean Functions},<br>YEAR = {1975},<br>PAGES = {27--36}, <br>BOOKTITLE = {Proc. 7th ACM-STOC 1975}, <br>EE = {http://doi.acm.org/10.1145/800116.803750},<br>}