1. Leibniz G., Leibniz: Selections, edited by WienerP.P. Charles Scribner’s Sons, New York (195 1)
2. Berkeley G., Berkeley’s Philosophical Writings, edited by Armstrong D.M., Collier-MacMillan, New York (1965)
3. Mach E., The Science of Mechanics, Open Court, La Salle (1960)
4. Ehrenfest P., Phys. Zeits., 10, 918 (1909)
5. Sagnac M.G., C.R. Acad. Sci. Paris, 157, 708, 1410 (1913)