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[Alexandra12]

Enrichment of yttrium from rare earth concentrate by ammonium carbonate leaching and peroxide precipitation
Journal of Alloys and Compounds, Volume 418, Issues 1-2, 20 July 2006, Pages 200-203
Mari E. de Vasconcellos, S.M.R. da Rocha, W.R. Pedreira, Carlos A. da S. Queiroz and Alcídio Abrão
http://dx.doi.org/10.1016/j.jallcom.2005.10.076

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