Rodionov et al. 2012

Rodionov N., Belyatsky B., Antonov A., Kapitonov I., Sergeev S. Comparative in-situ U-Th-Pb geochronology and trace element composition of baddeleyite and low-U zircon from carbonatites of the Paleozoic Kovdor alkaline-ultramafic complex, Kola Peninsula, Russia // Gondwana Research. 2012. V.21. P. 728-744.