@article{HainzlScherbaumBeauval2006,
  author    = {Sebastian Hainzl and Frank Scherbaum and C{\´e}line Beauval},
  title     = {Estimating background activity based on interevent-time distribution},
  doi       = {10.1785/0120050053},
  url       = {http://bssa.geoscienceworld.org/},
  year      = {2006},
}