The origin of deuterium

@article{Epstein1976TheOO,
  title={The origin of deuterium},
  author={R. Epstein and J. Lattimer and D. Schramm},
  journal={Nature},
  year={1976},
  volume={263},
  pages={198-202}
}
General nuclear constraints are used to show that deuterium is most likely of pregalactic origin. Big-bang nucleosynthesis is the most plausible source for significant amounts of this isotope, but other, more speculative, sources are not ruled out. 
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