Statistical properties of current helicity and twist distribution in the solar cycle by high resolution data from SOT/SP on board Hinode K. Otsuji 1),
Anisotropy of current helicity in solar active regions 1)Xu Haiqing, Gao Yu & Zhang Hongqi, NAOC 2) Kirill Kuzanyan, IZMIRAN, Russia 3) Rodion Stepanov,