@book{
  international1988iaea,
  title={International Centre for Theoretical Physics: Scientific Activities in 1987},
  series={TECDOC Series},
  number={488},
  year={1988},
  url={https://www.iaea.org/publications/743/international-centre-for-theoretical-physics-scientific-activities-in-1987},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}