1. British Standard Institution 1965: BS 1204–1965, part 2, specification for synthetic resin adhesives for wood
2. Forss, K.; Fuhrmann, A. 1976: KARATEX—The lignin-based adhesive for plywood, particleboard and fibreboard. Paperi ja Puu, 11:817
3. Van der Klashorst, G.H. 1985: Advances in the chemical utilization of alkali lignin. DSc. Thesis, University of Pretoria
4. Van der Klashorst, G.H.; Strauss, H.F., O.L.: The properties and potential utilization of industrial soda bagasse lignin (submitted for publication)
5. Nimz, H. 1983. Lignin-based wood adhesives. In: Wood adhesives, chemistry and technology (Ed. A. Pizzi). New York: Marcel Dekker Inc.