1. E. Anders and N. Grevesse, “Abundances of the Elements: Meteoritic and Solar,” Geochim. Cosmochim. Acta 53, 197–214 (1989).
2. A. A. Arzamastsev, F. Bea, L. V. Arzamastseva, and P. Montero, “Rare-Earth Elements in the Rocks and Minerals of Alkaline Intrusions of the Kola Peninsula as Indicators of the Evolution of Alkaline Melts,” Ross. Zh. Nauk o Zemle 4(3), 3–24 (2002).
3. V. V. Balaganskii, V. N. Glaznev, and L. G. Osipenko, “The Early Proterozoic Evolution of the Northeastern Baltic Shield: A Terrane Analysis,” Geotektonika, No. 2, 16–28 (1998) [Geotectonics 32 (2), 81 (1998)].
4. Yu. A. Balashov, “Paleoproterozoic Geochronology of the Pechenga-Varzuga Structure, Kola Peninsula,” Petrologiya 4(1), 3–25 (1996) [Petrology 4 (1), 1 (1996)].
5. B. Barbarin, “A review of the Relationships between Granitoid Types, their Origins and their Geodynamic Environments,” Lithos 46, 605–626 (1999).