1. Adams R. A. & Fournier J. J. F. (2003) Sobolev Spaces, 2nd edn. Pure and Applied Mathematics, vol. 140. Amsterdam: Elsevier.
2. A generic grid interface for parallel and adaptive scientific computing. Part I: abstract framework
3. A generic grid interface for parallel and adaptive scientific computing. Part II: implementation and tests in DUNE
4. Brett C. (2014) Optimal control and inverse problems involving point and line functionals and inequality constraints. Ph.D. Thesis, UK: University of Warwick. http://wrap.warwick.ac.uk/66437/. Accessed 3 August 2015.
5. Brett C. , Dedner A. S. & Elliott C. M. (2014) Optimal control of elliptic PDEs on surfaces of codimension 1, Preprint, http://arxiv.org/pdf/1411.4974.pdf. Accessed 3 August 2015.