Fukushima, Romualdo Shigueo, and Ronald Donald Hatfield. “Phenolic Composition of Dioxane Lignins As Determined by Nitrobenzene Oxidative Reaction”. Pesquisa Agropecuaria Brasileira, vol. 38, no. 3, Mar. 2003, pp. 373-8, doi:10.1590/S1678-3921.pab2003.v38.6579.