Edgar, A.D., et al. “Distribution of Fluorine Between Minerals and Glass in Lamproites, Lamprophyres and Kamafugites: Implications for the Role of F in Deep Mantle-Derived Magmas”. International Kimberlite Conference: Extended Abstracts, vol. 5, Feb. 1991, pp. 79-81, doi:10.29173/ikc2471.