@article{kay2009color,
  title = "Color image segmentation by the vector-valued Allen--Cahn phase-field model: a multigrid solution",
  author = "Kay, David A and Tomasi, Alessandro",
  year = "2009",
  journal = "IEEE Transactions on Image Processing",
  number = "10",
  pages = "2330--2339",
  publisher = "IEEE",
  volume = "18",
}