3. Chen Yao and Hu Youqiu, A two-dimensional Alfvén wave-driven solar wind model, Solar Phys., 199(2001), 371-384.
4. Hu Youqiu, Catastrophe of coronal magnetic flux ropes in partially open magnetic fields, Solar Phys., 200 (2001), 115-126.
5. Hu Youqiu and Jiang Yanwei, Catastrophe of coronal magnetic flux ropes caused by photospheric motions, Solar Phys., 203 (2001), 309-319.
6. Hu Youqiu, Jia xianzhe, Interplanetary shock interaction with the heliospheric current sheet and its associated structures, J. Geophys. Res., 106 (2001), 29299-29304.
7. Chen Yao and Hu Youqiu, Effect of flow-tube geometry on solar wind properties, Astrophys. Space Sci., 282(2002), 447-460.
8. Hu Youqiu and Li Lin, Stability of force-free field versus magnetic pitch, J. Plasma Phys., 67(2002), 139-147.
9. Chen Yao, R. Esser, and Hu Youqiu, Formation of minor ion charge states in the fast solar wind: Roles of differential flow speeds of ions of the same element, Astrophys. J., 582,2002, 467-474.
10. Hu Youqiu, Li Guoqiang, and Xing Xiaoyan, Equilibrium and catastrophe of coronal flux ropes in axisymmetrical magnetic field, J. Geophys. Res., 108 (A2), 2003, SSH7, 1-9.