1. K. V. Mosengeil:Ann. d. Phys.,22, 867 (1907).
2. M. Planck:Ann. d. Phys.,26, 1 (1908).
3. M. V. Laue:Relativitätstheorie, 3rd ed. (Berlin, 1952); W. Pauli:Theory of Relativity (London, 1958); O. Møller:Theory of Relativity (Oxford, 1955); W. H. MoCrea:Relativity Physics (New York, 1960), etc.
4. For example, A. S. Eddington:Mathematical Theory of Relativity (Cambridge, 1954), p.34, makes a cursory remark in this sense and concludes for eqs. (2) instead of the more generally aocepted eqs. (1).
5. H. Ott:Zeits. f. Phys.,175, 70 (1963).