KLEIN, D. R.; VLASOVA, T. J. Lichens, a unique forage resource threatened by air pollution. Rangifer, [S. l.], v. 12, n. 1, p. 21–27, 1992. DOI: 10.7557/2.12.1.1021. Disponível em: https://septentrio.uit.no/index.php/rangifer/article/view/1021. Acesso em: 16 jan. 2022.