@article{kay1999posteriori,
  title = "A posteriori error estimation for stabilized mixed approximations of the Stokes equations",
  author = "Kay, David and Silvester, David",
  year = "1999",
  journal = "SIAM Journal on Scientific Computing",
  number = "4",
  pages = "1321--1336",
  publisher = "Society for Industrial and Applied Mathematics",
  volume = "21",
}