1. Ahmed MAK, Fjellvåg H, Kjekshus A (1996) Syntheses and crystal structures of titanium oxide sulfates. Acta Chem Scand 50:275–283
2. Covington AD (2009) Tanning chemistry: the science of leather. Royal Society of Chemistry, Cambridge, UK
3. Covington AD (2011) Tanning chemistry. RSC Publishing, Cambridge
4. D’Aquino A, D’Elia G, Naviglio B, Seggiani M, Tomaselli M, Vitolo S (2003) Synthetic organic tanning based on melamine resin and THPS: development of a semi-industrial scale process for high-quality bovine upper leather. J Soc Leather Techno Chem 87:189–197
5. D’Aquino A, Barbani N, D’Elia G, Lupinacci D, Naviglio B, Seggiani M, Tomaselli M, Vitolo S (2004a) Combined organic tanning based on mimosa and oxazolidine: development of a semi-industrial scale process for high-quality bovine upper leather. J Soc Leather Technol Chem 88:47–55