Enrico Paolini Marc P. C. Fossorier Marco Chiani Doubly-Generalized LDPC Codes: Stability Bound Over the BEC. 1027-1046 2009 55 IEEE Transactions on Information Theory 3 http://dx.doi.org/10.1109/TIT.2008.2011446 db/journals/tit/tit55.html#PaoliniFC09