@inproceedings{sbim2009ls,
  title = {Editing Level-Set Models with Sketched Curves},
  author = {Manolya Eyiyurekli and Cindy Grimm and David Breen},
  booktitle = {Sketch-based Interfaces and Modeling},
  editor = {Cindy Grimm and Joe Laviola},
  pages = {45--52},
  publisher = {ACM},
  note = {Using level sets to evolve surfaces},
  month = {August},
  year = {2009}
}