@article{Wang-Wang-Kim-separation-ellipsoids,
  volume = {18},
  number = {6},
  mrnumber = {MR1843064 (2002c:65030)},
  issn = {0167-8396},
  author = {Wang, Wenping and Wang, Jiaye and Kim, Myung-Soo},
  mrclass = {65D17 (65D18)},
  fjournal = {Computer Aided Geometric Design},
  coden = {CAGDEX},
  title = {An algebraic condition for the separation of two ellipsoids},
  pages = {531--539},
  journal = {Comput. Aided Geom. Design},
  year = {2001},
}