Gurov, E. P., S. B. Shekhunova, and V. V. Permyakov. “Boltish Impact Structure and Its Impact-Melting Rocks”. Geofizicheskiy Zhurnal, vol. 33, no. 5, Oct. 2011, pp. 66-89, doi:10.24028/gzh.0203-3100.v33i5.2011.116856.