CRITTENDEN, P. D. Aspects of the ecology of mat-forming lichens. Rangifer, [S. l.], v. 20, n. 2-3, p. 127–139, 2000. DOI: 10.7557/2.20.2-3.1508. Disponível em: https://septentrio.uit.no/index.php/rangifer/article/view/1508. Acesso em: 22 oct. 2021.