MALLA, G. S. Melting ice: "Warning Signs". Journal of Agriculture and Environment, [S. l.], v. 8, p. 66–73, 2007. DOI: 10.3126/aej.v8i0.729. Disponível em: https://nepjol.info/index.php/AEJ/article/view/729. Acesso em: 18 sep. 2024.