@InProceedings{yfh:hsRAL2000031,
   title = {A multilevel algorithm for wavefront reduction},
   author = {Y. F. Hu and J. A. Scott},
   year = 2001,
   BookTitle = {SIAM Journal on Scientific Computing},
   att_url = {http://www2.research.att.com/areas/visualization/papers_videos/pdf/yfh-hsRAL2000031.pdf}
}