K.J. Li, H. S. Yun and X. M. Gu, “Hemispheric Variation in Solar Activity,” The Astrophysical Journal, Vol. 554, No. 1, 2001, pp. L115-L117. http://dx.doi.org/10.1086/320914

has been cited by the following article:

• TITLE: Asymmetry of Sunspot Distribution in KAU Solar Observations during 22 and 23 Solar Cycles

  AUTHORS: Hassan Mohammad Basurah, Amerah Fouad Dhignah, Fouad Yousef Kamal

  KEYWORDS: Sunspots; Long Solar Cycles; North-south Solar Asymmetry

  JOURNAL NAME: International Journal of Astronomy and Astrophysics, Vol.3 No.4, December 4, 2013

  ABSTRACT: The King Abdul Aziz University (KAU) solar observations of Sunspot on daily passes from 1981 to 2009 are used to investigate the North-South asymmetry variation of the sunspot numbers and its area. We found that the asymmetry dominated to be southern during the last two solar cycles, which evidently exists following a long-term characteristic time scale. Our results were in compliance with the global asymmetry.