1. A.D. Convington, The chemistry of tanning materials, In: Kite M., Thomson R., Ed(s)., Conservation of leather and related materials, Butterworth, Elsevier, 22 (2006).
2. B. Madhan, C. Muralidharan and R. Jayakumar, Biomaterials, 23(14), 2841 (2002).
3. J.H. Sharphouse, Leather Technicians Handbook, London, Buckland Press Ltd., 20 (1989).
4. S. Pitaru, M. Noff, L. Blok, E. Nir, S. Pitaru, A. Goldlust and N. Savion, Dermatologic Surgery, 33, 1045 (2007).
5. A.D. Covington, T. H. Lilley, L. Song and C. S. Evans, J. American Chemists Association, 100, 325 (2005).