Clark-Wilson
David Clark and David Wilson created the Clark-Wilson model, and its primary goal is information integrity, although it is more stringent than the Biba model. It also helps enforce the separation of duties principle.
Brewer-Nash
The Brewer-Nash model (sometimes called the Chinese Wall model) is documented by Dr. David F. C. Brewer and Dr. Michael J. Nash. Financial services organizations often implement this model to help prevent a conflict of interest, and it helps enforce the separation of duties principle.