@techreport{mal-sto-09-minbas-tr, 
  author={Ana Paula Resende Malheiro and Jorge Stolfi},
  title = {Finding Minimal Bases in Arbitrary Spline Spaces},
  institution = {Institute of Computing, UNICAMP},
  number = {IC-09-21},
  month = jun,
  year = 2009,
  pages = {21},
  abstract = {In  this  work  we  describe  a  general  algorithm  to  find  a finite-element basis with minimum total support for an arbitrary spline space, given  any basis for that same  space. The running time is exponential on $n$ in the worst case, but $O(n m^3)$ for many cases  of practical  interest, where $n$  is the  number of mesh cells and $m$ is the dimension of the spline space.}
}