@article{Xu2019, author = "Danli Xu and Yong Wang", title = "{Area-Proportional Visualization for Circular Data}", year = "2019", month = "8", url = "https://tandf.figshare.com/articles/dataset/Area-proportional_Visualization_for_Circular_Data/9638858", doi = "10.6084/m9.figshare.9638858.v2" }