A comparison of variational data assimilation and nudging using a simple dynamical system with chaotic behavior. - Wanglung Chung; John M. Lewis; S. Lakshmivarahan; Sudarshan K. Dhall (SAC, 1996)

Effect of data distribution in data assimilation using Burgers' equation. - Wanglung Chung; John M. Lewis; S. Lakshmivarahan; Sudarshan K. Dhall (SAC, 1997)