@book{
      international1981iaea,
      title={Protection Systems and Related Features (Heidelberg, 1-5 Sept. 1980)},
      author={ },
      series={entity},
      number={ },
      year={1981},
      isbn={92-0-010181-X },
      url={/publications/3396/protection-systems-and-related-features-heidelberg-1-5-sept-1980 },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }