@article{BL06,
  author    = {J. C. M. Baeten and S. P. Luttik},
  title     = {Guest editor's introduction: Special issue on Process Theory for Hybrid Systems},
  journal   = {Journal of Logic and Algebraic Programming},
  volume    = {68},
  number    = {1-2},
  year      = {2006},
  pages     = {1--3}
}