Îðèãèíàë: Ôîê Â À «Ðàáîòû À.À. Ôðèäìàíà ïî òåîðèè òÿãîòåíèÿ Ýéíøòåéíà» ÓÔÍ 80 353–356 (1963); DOI: 10.3367/UFNr.0080.196307b.0353
A.A. Fridman is author of Physics-Uspekhi