Kalashnikov A. «The Official Position of Mr. Rychkov is Still a Mystery»: Centre’s Emissary K.M. Rychkov in the Altai Okrug (1917-1918) // Izvestiya of Altai State University, 2023, № 2(130). P. 26-30 DOI: 10.14258/izvasu(2023)2-03. URL: http://izvestiya.asu.ru/article/view/%282023%292-03.