Spetsius, Zdislav V., and W.L. Griffin. 1995. “Trace Elements in Silicate and Ore Minerals of Eclogite Xenoliths from Kimberlite Pipe Udachnaya, Yakutia”. International Kimberlite Conference: Extended Abstracts 6 (1):575-77. https://doi.org/10.29173/ikc1972.