@Article{Dominguez:2008:ASM,
  author =       "V\'{i}ctor Dom\'{i}nguez and Francisco-Javier Sayas",
  title =        "Algorithm 884: A Simple {Matlab} Implementation of the {Argyris} Element",
  journal =      "{ACM} Transactions on Mathematical Software",
  volume =       "35",
  number =       "2",
  month =        jul,
  year =         "2008",
  pages =        "16:1--16:11",
  URL =          "http://doi.acm.org/10.1145/1377612.1377620",
  abstract =     "In this work we propose a new algorithm to evaluate the basis functions of the Argyris finite element and 
                 their derivatives. The main novelty here is an efficient way to calculate the matrix which gives the change 
                 of coordinates between the bases of the Argyis element for the reference and for an arbitrary triangle. 
                 This matrix is factored as the product of two rectangular matrices with a strong block structure which makes 
                 their computation very easy. We show and comment an implementation of this algorithm in Matlab. Two numerical 
                 experiments, an interpolation of a smooth function on a triangle and the finite element solution of the 
                 Dirichlet problem for the bilaplacian, are presented in the last section to check the performance of our 
                 implementation",
}