Thomas R. Halford, Keith M. Chugg, Alex J. Grant. Which Codes Have 4-Cycle-Free Tanner Graphs?. In Proceedings 2006 IEEE International Symposium on Information Theory, ISIT 2006, The Westin Seattle, Seattle, Washington, USA, July 9-14, 2006. pages 871-875, IEEE, 2006. [doi]
Abstract is missing.