@inbook{12481,
  author = {Robert Kirby and Matthew Knepley and Anders Logg and Ridgway Scott and Andy Terrel},
  title = {Discrete Optimization of Finite Element Matrix Evaluation},
  year = {2012},
  journal = {Automated Solution of Differential Equations by the Finite Element Method},
  volume = {84},
  chapter = {9},
  pages = {161-168},
  publisher = {Springer},
  isbn = {978-3-642-23098-1},
  editor = {Anders Logg and Kent-Andre Mardal and Garth Wells},
}