Igneous rocks a classification and glossary of terms - Le Maitre, R. W.; Streckeisen, A.; Zanettin, B.; Le Bass, M.J; Bonin, B.; Bateman, P.; Belliene, G.; Dudek, A.; Efremova, S.; Keller, J.; Lameyre, J.; Sabine, P.A; et al. (Cambridge University Press, 2004)