[2] Cavendish, H.: Experiments to determine the density of the earth. Phil. Trans. R. Soc., 88 (1798), 469–526 (Reprint: Thorpe, E. (ed): The Scientific Papers of the Honourable Henry Cavendish, FRS. Cambridge University Press, Cambridge, 1921, s. 249–286).
[3] Brož, J., Roskovec, V.: Základní fyzikální konstanty. SPN, Praha, 1988.