1. Kirk, T. K.; Harkin, J. M.: Lignin biodegradation and the bioconversion of wood. Am. Inst. Chem. Engineers Symposium Series No$1133, vol. 69 (1973) 124–126.
2. Björkman, A.: Studies on finely divided wood. 1. Extraction of lignin with neutral solvents. Sv. Papperstidn. 59 (1956) 477.
3. Kirk, T. K.; Chang, H-m.: Decomposition of lignin by white-rot fungi. Isolation of heavily degraded lignins from decayed spruce. Holzforschung (in press).
4. Kirk, T. K.; Chang, H-m.: Decomposition of lignin by white-rot fungi. Characterization of heavily degraded lignins from decayed spruce. Holzforschung (in press).
5. Kirk, T. K.: Effects of a brown-rot fungus, Lenzites trabea, on lignin in spruce wood. Holzforschung (in press).