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2. Y. L. Song,M. Zhang,On the relationship between sunspot structure and magnetic field changes associated with solar flares,2016,ApJ,826,173;

3. J. Hao,M. Zhang,Hemispheric helicity trend for solar cycle 24,2011,ApJ Letters,733,L27;

4. C. Y. Wang,M. Zhang,A hemispheric helicity sign rule indicated by large-scale photospheric magnetic fields at three phases of solar cycle 23,2010,ApJ,720,632-638;

5. D. Wang,M. Zhang,H. Li & H. Q. Zhang,A cross-comparison of cotemporal magnetograms obtained with MDI/SOHO and SP/Hinode,2009,Solar Physics,260,233-244;

6. M. Zhang,N. Flyer,The dependence of the helicity bound of force-free magnetic fields on the boundary conditions,2008,ApJ,683,1160-1167;

7. M. Zhang,Helicity observation of weak and strong fields,2006,ApJ,646,L85-L88;

8. M. Zhang,N. Flyer,B. C. Low,Magnetic field confinement in the corona: The role of magnetic helicity accumulation,2006,ApJ,644,575-586;

9. M. Zhang,B. C. Low,The hydromagnetic nature of solar coronal mass ejections,2005,Annual Reviews of Astronomy and Astrophysics,43,103-137;

10. M. Zhang,B. C. Low,Magnetic-flux emergence into the solar corona. III. The role of total helicity conservation,2003,ApJ,584,479-496.