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3. S. B. Dubovichenko, Radiative Neutron Capture: Primordial Nucleosynthesis of the Universe, Walter de Gruyter GmbH, Berlin (2019); https://doi.org/10.1515/9783110619607-202.
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5. https://physics.nist.gov/cgi-bin/cuu/Value?mud%7csearch_for%2520=atomnuc!.