ALOYAN, P. G.; GUYUMJYAN, H. P. ALUMINIC-RARE-EARTH-PRECIOUS METALS FORMATION IN NEPHELINE SYENITES OF ARMENIA. Proceedings of the YSU C: Geological and Geographical Sciences, Yerevan, Armenia, v. 45, n. 2 (225), p. 10–16, 2011. DOI: 10.46991/PYSU:C/2011.45.2.010. Disponível em: https://pub.ysu.am/index.php/proceedings-geol-geogr/article/view/vol45_no2_2011_pp010-016. Acesso em: 22 nov. 2024.