@InProceedings{wscg98-roettger,
  author = {Roettger, S. and Heidrich, W. and Slusallek, Ph. and Seidel,H.-P.},
  title  = {{Real-Time Generation of Continuous Levels of Detail for Height Fields}},
  year   = {1998},
  pages  = {315-322},
  booktitle = {{Procceedings of WSCG '98}}
}