@article{v002a006,
 author = {Ran Raz},
 title = {Separation of Multilinear Circuit and Formula Size},
 year = {2006},
 pages = {121-135},
 doi = {10.4086/toc.2006.v002a006},
 publisher = {Theory of Computing},
 journal = {Theory of Computing},
 volume = {2},
 number = {1},
 URL = {http://www.theoryofcomputing.org/articles/v002a006},
}