@misc{indiciaef37c6e00d1dd,
  title = {A Multilevel Algorithm for the Solution of Second Order Elliptic Differential Equations on Sparse Grids},
  author = {Pflaum, Christoph},
  year = {1996},
  url = {https://ntrs.nasa.gov/citations/19970006613},
  note = {Source identifier: 19970006613}
}