1. ABNT (2010) NBR 7989: Pasta celulósica e madeira—Determinação de lignina insolúvel em ácido. Rio de Janeiro
2. Balbinot R, Schumacher MV, Watzlawick LF, Sanquetta CR (2003) Inventário do carbono orgânico em um plantio de Pinus taeda aos 5 anos de idade no Rio Grande do Sul. Revista Ciências Exatas e Naturais 5:59–68
3. Baldock JA, Broos K (2012) Soil organic matter. In: Huang PM, Li Y, Sumner ME (eds) Hanbook of soil sciences: properties and processes, 2nd edn. CRC Press, Boca Raton, pp 12.11–12.23
4. Bayer C, Mielniczuk J, Amado TJC, Martin-Neto L, Fernandes SV (2000) Organic matter storage in a sandy clay loam Acrisol affected by tillage and cropping systems in southern Brazil. Soil Till Res 54:101–109.
https://doi.org/10.1016/s0167-1987(00)00090-8
5. Blair GJ, Lefroy RDB, Lise L (1995) Soil carbon fractions based on their degree of oxidation, and the development of a carbon management index for agricultural systems. Aust J Agric Res 46:1459–1466