| http://www.w3.org/ns/prov#value | - U.S. Pat. No. 4,746,456, U.S. Pat. No. 4,846,995, DE-A 3 711 299, U.S. Pat. No. 4,904,408, U.S. Pat. No. 4,846,994 and U.S. Pat. No. 4,849,126 or modified celluloses such as methylcellulose, hydroxypropylcellulose or carboxymethylcellulose.
|
