中国空间科学技术
 Quasi-cycleLDPCConstructionMethod BasedonProtographExpansion 
GONG Xian-Feng, TAO Xiao-Feng, QIU Le-De
Chinese Space Science and Technology . 2012, (2): 62 -67 .  DOI: 10.3780/j.issn.1000-758X.2012.02.010