[1]
I. S. Butov, “Evidence of unidentified «aeroplanes» in Viciebsk guberniya in 1914–1915: a look through the prism of the era”, Журнал БГУ. История, no. 3, pp. 23–33, Jul. 2020, doi: 10.33581/2520-6338-2020-3-23-33.