@book{
  international2011iaea,
  title={National Strategy for Regaining Control over Orphan Sources and Improving Control over Vulnerable Sources},
  series={Specific Safety Guide},
  number={SSG-19},
  year={2011},
  isbn={978-92-0-115610-5},
  url={https://www.iaea.org/publications/8643/national-strategy-for-regaining-control-over-orphan-sources-and-improving-control-over-vulnerable-sources},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}