@article{781821,
  author = {J. Zimmerman and James Beall and M. Cromar and Ronald Ono},
  title = {Operation of a YBa<sub>2</sub>Cu<sub>3</sub>O<sub>x</sub> rf-SQUID at 81 K},
  year = {1987},
  number = {57},
  month = {1987-08-24 00:08:00},
  publisher = {Applied Physics Letters},
  language = {en},
}