1. Suurmakki, A., Heijnesson, A., Buchert, J., Tenkanan, M., Viikari, L., & Westermark, V. (1996). Journal of Pulp and Paper Science, 22, 78–83.
2. Kuhad, R. C., Singh, A., & Eriksson, K. E. (1997). Advances in Biochemical Engineering/Biotechnology, 57, 45–125. doi: 10.1007/BFb0102072 .
3. Puls, J. (1997). Macromolecular Symposia, 120, 183–196.
4. Lee, J. T., Bailey, C., & Cartwright, A. L. (2003). Poultry Science, 82, 1925–1931.
5. Sachslehner, A., Foidl, G., Foidl, N., & Gubitz, G. J. (2000). Biotechnology, 80, 127–134. doi: 10.1016/S0168-1656(00)00253-4 .