@article{BFJS:02,
  author = {M. Bunge and J. Funk and M. Jibladze and T. Streicher},
  title = {The Michael completion of a topos spread},
  pages = {63-91},
  year = {2002},
  volume = {175},
  number = {1-3},
  journal = {J.~Pure Appl.~Algebra},
}