Benner, P., Saak, J., Schieweck, F., Skrzypacz, P., & Weichelt, H. K. (2014). A Non-Conforming Composite Quadrilateral Finite Element Pair for Feedback Stabilization of the Stokes Equations. Journal of Numerical Mathematics, 22(3), 191-220. doi:10.1515/jnma-2014-0009.