Ancient burial mounds - biodiversity hotspots and refugees for natural flora and vegetation. Годишник на Софийския Университет „Св. Климент Охридски“, Биологически факултет, Книга 2 – Ботаника, [S. l.], v. 104, p. 75–84, 2025. DOI: 10.60066/GSU.BIOFAC.Bot.104.75-84. Disponível em: https://annual.uni-sofia.bg/index.php/biofac-botany/article/view/1577. Acesso em: 15 dec. 2025.