Dong Hoon Lee 0002 Jaeheon Kim Jin Hong Jae Woo Han Dukjae Moon Algebraic Attacks on Summation Generators. 34-48 http://dx.doi.org/10.1007/978-3-540-25937-4_3 2004 conf/fse/2004 FSE db/conf/fse/fse2004.html#LeeKHHM04