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. (2026). Bulletin of Taras Shevchenko National University of Kyiv. History, 162(1-2). https://history.bulletin.knu.ua/en/article/view/10321