Kevin M. Holtman Holtman, K. M., Chang, H.-M., & Kadla, J. F. (2007). An NMR comparison of the whole lignin from milled wood, MWL, and REL dissolved by the DMSO/NMI procedure. JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 27(3-4), 179–200. https://doi.org/10.1080/02773810701700828 Holtman, K. M., Chang, H. M., Jameel, H., & Kadla, J. F. (2006). Quantitative C-13 NMR characterization of milled wood lignins isolated by different milling techniques. JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 26(1), 21–34. https://doi.org/10.1080/02773810600582152 Holtman, K. M., Chang, H. M., & Kadla, J. F. (2004). Solution-state nuclear magnetic resonance study of the similarities between milled wood lignin and cellulolytic enzyme lignin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 52(4), 720–726. https://doi.org/10.1021/jf035084k Holtman, K. M., Chang, H. M., Jameel, H., & Kadla, J. F. (2003). Elucidation of lignin structure through degradative methods: Comparison of modified DFRC and thioacidolysis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 51(12), 3535–3540. https://doi.org/10.1021/jf0340411 Ikeda, T., Holtman, K., Kadla, J. F., Chang, H. M., & Jameel, H. (2002). Studies on the effect of ball milling on lignin structure using a modified DFRC method. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 50(1), 129–135. https://doi.org/10.1021/jf010870f