@conference{9098,
  author = {D. Hils and John Hall},
  title = {Ultra-stable cavity-stabilized lasers with subhertz linewidth},
  year = {1988},
  publisher = {Springer},
  address = {Ancona, Italy},
  isbn = {354050818X},
  url = {http://link.springer.com/chapter/10.1007/978-3-642-74501-0_30$\#$page-1},
  note = {JILA Pub. 3966},
}