1. Fuks, V., Khimiya lignina (Lignin Chemistry), Berlin: ONTI, 1936.
2. Payen, A., Compt. Rend., 1938, vol. 7, p. 1052.
3. Shubert, V.D., Biokhimiya lignina (Lignin Biochemistry), Moscow: Lesnaya promyshlennost’, 1969.
4. Freudenberg, K., J. Chem. Educ., 1932, vol. 9, no. 7, pp. 1171–1180.
5. Bogolitsin, K.G., Lunin, V.V., Kosyakov, D.S., et al., Fizicheskaya khimiya lignina (Physical Chemistry of Lignin), Moscow: Akademkniga, 2010.