@inproceedings{incorporatinguserinteractionand,
  title = {Incorporating User Interaction and Topological Constraints within Contour Completion via Discrete Calculus},
  author = {Jia Xu and Maxwell D. Collins and Vikas Singh},
  year = {2013},
  booktitle = {CVPR 2013 6},
  url = {http://openaccess.thecvf.com/content_cvpr_2013/html/Xu_Incorporating_User_Interaction_2013_CVPR_paper.html},
}