Mahotkin, I.L., and E.M.W. Skinner. “Kimberlites from the Archangelsk Region - a Rock Type Transitional Between Kimberlites, Melnoites and Lamproites”. International Kimberlite Conference: Extended Abstracts 7, no. 1 (April 17, 1998): 532–534. Accessed March 29, 2024. https://ikcabstracts.com/index.php/ikc/article/view/2794.