Beeskow-Strauch, B., Treloar, P. J., Rankin, A. H., Vennemann, T., Spangenberg, J. (2006): A reassessment of models for hydrocarbon generation in the Khibiny nepheline syenite complex Kola Peninsula, Russia. - Lithos, 91, 1-4, 1-18.https://doi.org/10.1016/j.lithos.2006.03.006