KRADIN, Nikolai. Small and Historic Cities of Zabaikalye: Architectural Heritage of Troitskosavsk-Kyakhta. project baikal, Russian Federation, n. 63, p. 123-129, mar. 2020. ISSN 2309-3072. Available at: <http://projectbaikal.com/index.php/pb/article/view/1602>. Date accessed: 06 june 2020.