@article{GrajewskiHronTurek2006,
  author    = {Grajewski, Matthias and Hron, Jaroslav and Turek, Stefan},
  title     = {Numerical analysis for a new non-conforming linear finite element on quadrilaterals},
  series = {Journal of Computational and Applied Mathematics},
  volume    = {193},
  journal   = {Journal of Computational and Applied Mathematics},
  number    = {1},
  issn      = {0377-0427},
  doi       = {10.1016/j.cam.2005.05.024},
  pages     = {38 -- 50},
  year      = {2006},
  language  = {en}
}
@article{GrajewskiHronTurek2005,
  author    = {Grajewski, Matthias and Hron, Jaroslav and Turek, Stefan},
  title     = {Dual weighted a posteriori error estimation for a new nonconforming linear finite element on quadrilaterals},
  series = {Applied Numerical Mathematics},
  volume    = {54},
  journal   = {Applied Numerical Mathematics},
  number    = {3-4},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0168-9274},
  doi       = {10.1016/j.apnum.2004.09.016},
  pages     = {504 -- 518},
  year      = {2005},
  abstract  = {After a short introduction of a new nonconforming linear finite element on quadrilaterals recently developed by Park, we derive a dual weighted residual-based a posteriori error estimator (in the sense of Becker and Rannacher) for this finite element. By computing a corresponding dual solution we estimate the error with respect to a given target error functional. The reliability and efficiency of this estimator is analyzed in several numerical experiments.},
  language  = {en}
}