Arvind Sridharan Dmitri V. Truhachev Michael Lentmaier Daniel J. Costello Jr. Kamil Sh. Zigangirov Distance Bounds for an Ensemble of LDPC Convolutional Codes. 4537-4555 2007 53 IEEE Transactions on Information Theory 12 http://dx.doi.org/10.1109/TIT.2007.909113 db/journals/tit/tit53.html#SridharanTLCZ07