Valchev I. Старините в прохода Траянови врата в пътеписите от XVI–XIX век: Antiquities around the Trajan’s Gate Pass in travelogues from the 16th to the 19th century. Be-JA [Internet]. 2024 Dec. 22 [cited 2025 Jan. 15];14(2):235-58. Available from: https://be-ja.org/index.php/journal/article/view/330