Biotites from Rare-Metal Granites of Ruska-Polyana Massif (Ingul Megablok, the Ukranian Shield) - O. V. Zaiats; A. L. Larikov; V. B. Soboliev; S. V. Kushnir; O. A. Vyshnevskyi; L. V. Somka (Geochemistry and ore formation, 2016)