Mark Braverman Stephen A. Cook Pierre McKenzie Rahul Santhanam Dustin Wehr Branching Programs for Tree Evaluation. 175-186 2009 MFCS http://dx.doi.org/10.1007/978-3-642-03816-7_16 conf/mfcs/2009 db/conf/mfcs/mfcs2009.html#BravermanCMSW09