Pjatʹ let bez Sovetskoj vlasti metamorfozy pensionnoj sistemy na vostoke Rossii (ijunʹ 1918-oktjabrʹ 1922 godov) = Five years without Soviet power : the metamorphoses of the pension system in the Russian East (june 1918-october 1922) - Rynkov, Vadim Markovič 1972- (2020)