Mahotkin, I. 1998. Petrology of group 2 kimberlite - olivine lamproite (K2L) from the Kostomuksha area, Karelia, N.W. Russia. International Kimberlite Conference: Extended Abstracts. 7, 1 (Apr. 1998), 529–531. DOI:https://doi.org/10.29173/ikc2793.