Tài liệu tham khảo WikiPedia: Ailuropoda //www.ncbi.nlm.nih.gov/pmc/articles/PMC1904166 //www.ncbi.nlm.nih.gov/pubmed/17578912 //dx.doi.org/10.1073%2Fpnas.0704198104 http://www.pnas.org/cgi/reprint/0704198104v1
