Angellotti, M.C., S.B. Bhuiyan, G. Chen, and X.-F. Wan. 2007. CodonO: codon usage bias analysis within and across genomes. Nucleic Acid Research, 35: W132-W136 LINK
Wan, X.-F., J. Zhou, and D. Xu. 2006. CodonO: a new informatics method measuring synonymous codon usage bias. International Journal of General Systems, 35: 109-125. PDF
Wan, X.-F., D. Xu, A. Kleinhofs, and J. Zhou. 2004. Quantitative relationship between codon usage bias and GC composition across the unicellular genomes. BMC Evolutionary Biology, 4: 19 LINK
Wan, X., D. Xu, and J. Zhou. 2003. A new informatics method measuring synonymous codon usage bias. In Intelligent engineering systems through artificial neural networks, vol 13, eds. Dagli et al., 1101-1018. New York, NY: ASME Press. PDF