11–15 Schwarzschild 1916a, Schwarzschild 1916b and Reissner 1916 (later complemented in Nordström 1918) Einstein 1917, cf. Pais 1982, ch.
11–15 Schwarzschild 1916a, Schwarzschild 1916b και Reissner 1916 (αργότερα συμπληρώθηκε από το Nordström 1918) Einstein 1917, cf.