Делвинска, Елена. “In the Labyrinths of Intelligence in Antiquity and the Middle Ages. Review: Liliana Simeonova, In the Half-Shadows of History. Communications, Espionage and Poisonings Throughout the Ages. Sofia: IB&CT-BAS, Iztok-Zapad Publishing House, 2022, 415 P.”. Drinovsky sbornik 16 (March 17, 2024). Accessed December 6, 2025. https://periodicals.karazin.ua/drinov/article/view/23316.