Britt, P.F.; Buchanan, A.C. III & Cooney, M.J. Pyrolysis mechanisms of lignin model compounds, article, June 1, 1997; (https://digital.library.unt.edu/ark:/67531/metadc696366/m1/1/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .