Mahotkin, I.L., and E.M.W. Skinner. 1998. “Kimberlites from the Archangelsk Region - a Rock Type Transitional Between Kimberlites, Melnoites and Lamproites”. International Kimberlite Conference: Extended Abstracts 7 (1):532-34. https://doi.org/10.29173/ikc2794.