@book{
  international1981iaea,
  title={Ultimate Heat Sink and Directly Associated Heat Transport Systems for Nuclear Power Plants: A Safety Guide},
  series={Safety Series},
  number={50-SG-D6       },
  year={1981},
  isbn={92-0-123581-X},
  url={https://www.iaea.org/publications/3415/ultimate-heat-sink-and-directly-associated-heat-transport-systems-for-nuclear-power-plants-a-safety-guide},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}