Report on the International meeting Payment for ecosystem services - forest for water (COST Action 15206 PESFOR-W), Albena, Bulgaria. Годишник на Софийския Университет „Св. Климент Охридски“, Биологически факултет, Книга 2 – Ботаника, [S. l.], v. 102, p. 141–150, 2018. DOI: 10.60066/GSU.BIOFAC.Bot.102.141-150. Disponível em: https://annual.uni-sofia.bg/index.php/biofac-botany/article/view/1601. Acesso em: 15 dec. 2025.