Involutorial Simple Algebras and Real Riemann Matrices.

@article{AlbertInvolutorialSA,
  title={Involutorial Simple Algebras and Real Riemann Matrices.},
  author={Arthur Albert},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  volume={20 12},
  pages={
          676-81
        }
}
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