A. Robert Calderbank Anna C. Gilbert Kirill Levchenko S. Muthukrishnan Martin Strauss Improved range-summable random variable construction algorithms. 840-849 2005 conf/soda/2005 SODA http://doi.acm.org/10.1145/1070432.1070550 db/conf/soda/soda2005.html#CalderbankGLMS05