MILEV, Milko; PETKOVA, Krasimira; ILIEV, Nasko. Afforestation in Bulgaria. REFORESTA, [S. l.], n. 3, p. 143–154, 2017. DOI: 10.21750/REFOR.3.12.36. Disponível em: https://journal.reforestationchallenges.org/index.php/REFOR/article/view/60.. Acesso em: 30 apr. 2025.