First application of a drone for studies of the biodiversity of Bulgarian extremophilic algae in the Marikostinovo thermal complex. Годишник на Софийския Университет „Св. Климент Охридски“, Биологически факултет, Книга 2 – Ботаника, [S. l.], v. 103, p. 5–37, 2019. DOI: 10.60066/GSU.BIOFAC.Bot.103.5-37. Disponível em: https://annual.uni-sofia.bg/index.php/biofac-botany/article/view/1578. Acesso em: 14 dec. 2025.