Kuzina	Kuzin, A.     Some common features in the picture of distributions of elastic heterogeneities of the crust and upper mantle of the Northern Caucasus accordingly to the earthquake converted-wave method, the deep seismic sounding and seismology [Текст] / A. Kuzin, L. Shumlyanska // Геофизический журнал. — Київ, 1996. — № 1. — С. 82-83.