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2. Stabilized Bubble Element for Incompressible Navier-Stokes Equation: Finite Elements in Flow Problem 2000, Austin, Texas, 2000.
3. On the Reration between Petrov-Galerkin Finite Element Method and Bubble Element. European Congress on Computational Methods in Applied Sciences and Engineering, Barcelona, Spain, 2000.
4. A New Bubble Element Prompts Stabilized Methods for Incompressible Flows. Tokyo Workshop of Information Technology in Hydroscience and Engineering, Japan, 2000.
5. Neumann Control of Unstable Parabolic Systems: Numerical Approach