LJUBENOVA, M. Solar energy utilization and efficiency of an oak forest in the Vakarel mountains . Macedonian Journal of Ecology and Environment, [S. l.], v. 2, n. 2, p. 31–35, 1994. Disponível em: https://mjee.org.mk/index.php/mjee/article/view/26. Acesso em: 3 may. 2024.