1. E. C. Bullard: The Disturbance of the Temperature Gradient in the Earth's Crust by Inequalities of Height. MNRAS., Geop. Suppl., 4 (1938), 360.
2. H. S. Carslaw, J. C. Jaeger: Conduction of Heat in Solids. Oxford Univ. Press, London 1959, 10.
3. V. Čermák: Heat Flow Map of Czechoslovakia. In: Geophysical Syntheses in Czechoslovakia (Ed. A. Zátopek), Veda, Bratislava 1981, 441.
4. V. Čermák: Review of Heat Flow Measurements in Czechoslovakia. In: Terrestrial Heat Flow in Europe (Eds V. Čermák, L. Rybach), Springer Vlg, Berlin etc. 1979, 152.
5. V. Čermák, L. Rybach: Thermal Conductivity and Specific Heat of Minerals and Rocks. In: Landolt-Börnstein, Physical Properties of Rocks, Vol. 5/1a (Ed. G. Angenheister), Springer Vlg, Berlin etc. 1982, 305.