1. Bull. of the Volcanol. Station;G. S. Gorshkov,1954
2. Bull. of the Volcanol. Station;G. S. Gorshkov,1956
3. Shebalin, N. V. —Earthquake energy, intensity and focal depth. Bull. Acad. Sci USSR, Geophys, ser., No 4, 1955. (In Russian).
4. Minakami, T. —On explosive activities of andesitic volcanoes and their forerunning phenomena. Bull. Volc., Sér. II, tome X, Napoli, 1950.
5. Perret, F. A. —The eruption of Mt. Pelée 1929–1932. Carnegie Inst. Washington, Publ. 458, 1935.