@inbook{3991,
  abstract     = {We give analytic inclusion-exclusion formulas for the area and perimeter derivatives of a union of finitely many disks in the plane.},
  author       = {Cheng, Ho and Edelsbrunner, Herbert},
  booktitle    = {Computer Science in Perspective: Essays Dedicated to Thomas Ottmann},
  isbn         = {9783540005797},
  pages        = {88 -- 97},
  publisher    = {Springer},
  title        = {{Area and perimeter derivatives of a union of disks}},
  doi          = {10.1007/3-540-36477-3_7},
  volume       = {2598},
  year         = {2003},
}