ACETO, L.; ÉSIK, Z.; INGÓLFSDÓTTIR, A. Equational Theories of Tropical Semirings. BRICS Report Series, [S. l.], v. 8, n. 21, 2001. DOI: 10.7146/brics.v8i21.21682. Disponível em: https://tidsskrift.dk/brics/article/view/21682. Acesso em: 29 mar. 2024.