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3. V. Kropáček: Changes of the Magenetic Susceptibility and Its Anisotropy of Basalts by Oxidation of Titanomagnetites. Studia geoph. et geod., 20 (1976), 178.
4. V. Kropáček: The Changes of Magnetic Properties of Tertiary Alkali Basalts by Oxidation of Titanomagnetites. Publs. Inst. Geoph. Pol. Acad. Sci., C-1 (1976), 75.
5. V. Kropáček: The Magnetic Properties of Young Volcanic Rocks of the Bohemian Massif. Publ. Inst. Geoph. Pol. Acad. Sci., C-1 (1976), 65.