@article{RZP12a,
 author = {Rodgers, Peter and Zhang, Leishi and Purchase, Helen},
 doi = {10.1109/TVCG.2011.143},
 journal = {IEEE Transactions on Visualization and Computer Graphics},
 month = {Jul},
 number = {7},
 pages = {1089-1100},
 title = {Wellformedness Properties in Euler Diagrams: Which Should be Used?},
 volume = {18},
 year = {2012}
}