@inproceedings{pot-99-scul-ab,
  author = {Helmut Pottmann},
  title = {Geometry of Sculptured Surface Machining},
  booktitle = {Abstracts of the 4th International AFA Conference on Curves and Surfaces},
  location = {Saint-Malo, France},
  pages = {63--64},
  year = 1999,
  month = jun
}