John Brevik Michael E. O'Sullivan Anya Umlauf Richard Wolski Simulation of the Sum-Product Algorithm Using Stratified Sampling. 65-72 2009 AAECC http://dx.doi.org/10.1007/978-3-642-02181-7_7 conf/aaecc/2009 db/conf/aaecc/aaecc2009.html#BrevikOUW09