1. ABNT (1982) NBR 7402: charcoal—granulometric determination—method of test. Associação Brasileira de Normas Técnicas, Rio de Janeiro (in Portuguese)
2. ABNT (1984) NBR 7416: charcoal—determination of breakage index. Drop test. Associação Brasileira de Normas Técnicas, Rio de Janeiro (in Portuguese)
3. ABNT (1985) NBR 8740: charcoal—determination of rupture and abrasion index—method of test. Associação Brasileira de Normas Técnicas, Rio de Janeiro (in Portuguese)
4. Andrade AM, Della Lucia R (1995) Evaluation of wood charcoal hygroscopicity and its effects on the compression resistance of charcoal. Floresta e Ambiente 2:19–26 (in Portuguese)
5. Antal MJ, Grønli M (2003) The art, science and technology of charcoal production. Ind Eng Chem Res 42(8):1619–1640