Shchekotilov В. Г., Lazarev О. Е., Shalaeva М. В., and Shchekotilova С. Н. “To the 80th Anniversary of the Liberation of Kalinin. Recognition of the Dead 81 Soldiers 243 Sd According to the Spatio-Temporal Data of Archival Documents”. HERALD OF TVER STATE UNIVERSITY. SERIES: GEOGRAPHY AND GEOECOLOGY, no. 4 (36), Dec. 2021, pp. 93-101, https://journal.tversu.ru/index.php/geo/article/view/302.