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Ali Z. Khokhar, Keith Parsons, Graham Hubbard, Ian M. Watson, Faiz Rahman, Douglas S. Macintyre, Chang Xiong, David Massoubre, Zheng Gong, Erdan Gu, Nigel P. Johnson, Richard M. De La Rue, Martin D. Dawson, Steve J. Abbott, Martin D. B. Charlton, and Martin Tillin, "Emission characteristics of photonic crystal light-emitting diodes," Appl. Opt. 50, 3233-3239 (2011)
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