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Beynon, J., Al-Ani, S.K.J. & El-Samanoudy, M.M.A.G. The optical properties of Al x O y thin films prepared by reactive evaporation. J Mater Sci Lett 12, 308–310 (1993). https://doi.org/10.1007/BF01910086
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DOI: https://doi.org/10.1007/BF01910086