Materials from French archives about Ivan Mazepa in 1708: from the deconstruction of Ilko Borshchak’s hoaxes to new findings: DOI: https://doi.org/10.17721/1728-2640.2026.162.1. ВКНУІ. 2026;162(1-2). Accessed October 2, 2026. https://history.bulletin.knu.ua/en/article/view/10321