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Widmer, Remo; Malsy, Anna-Kathrin; Armbruster, Thomas Michael (2015). Effects of heat treatment on red gemstone spinel: single-crystal X-ray, Raman, and photoluminescence study. Physics and chemistry of minerals, 42(4), pp. 251-260. Springer 10.1007/s00269-014-0716-7
Schmetzer, Karl; Malsy, Anna-Kathrin (2011). Natural alexandrite with an irregular growth pattern, a case study. The Journal of the Gemmological Association of Hong Kong, XXXII(1-10), pp. 68-76. Gemmological Association of Hong Kong
Schmetzer, Karl; Malsy, Anna-Kathrin (2011). Alexandrite and colour-change chrysoberyl from the Lake Manyara alexandrite-emerald deposit in northern Tanzania. Journal of gemmology, 32(5-8), pp. 179-209. Gemmological Association of Great Britain
Schmetzer, Karl; Malsy, Anna-Kathrin; Stocklmayer, V.; Stocklmayer, S. (2011). Alexandrites from the Novello alexandrite-emerald deposit, Masvingo District, Zimbabwe. The Australian Gemmologist, 24(6), pp. 133-147. Gemmological Association of Australia
