@article{Keshri:164984,
      author        = "Keshri, S. and Marín-Sáez, J. and Naydenova, I. and
                       Murphy, K. and Atencia, J. and Chemisana, D. and Garner, S.
                       and Collados, M.V. and Martin, S.",
      title         = "{Stacked volume holographic gratings for extending the
                       operational wavelength range in LED and solar
                       applications}",
      year          = "2020",
}