Yong Sun Momin Uppal Angelos D. Liveris Samuel Cheng Vladimir Stankovic Zixiang Xiong Nested turbo codes for the Costa problem. 388-399 2008 56 IEEE Transactions on Communications 3 http://dx.doi.org/10.1109/TCOMM.2008.050101 db/journals/tcom/tcom56.html#SunULCSX08