For citations:

Putintseva E.V., Spiridonov E.M. Penetration twins of olivine in alkaline melanocratic basalts from the collection of N.M. Przhevalsky. Proceedings of higher educational establishments. Geology and Exploration. 2015;(4):82-85. (In Russ.) https://doi.org/10.32454/0016-7762-2015-4-82-85