1. Abramenko, V.I., Relationship between magnetic power spectrum and flare productivity in solar active region, Astrophys. J., 2005, vol. 629, pp. 1141–1149.
2. Abramenko, V.I. and Gopasyuk, S.I., The electric current system and magnetic field structure of the active region, Izv. Krym. Astrofiz. Obs., 1987, vol. 76, pp. 147–168.
3. Abramenko, V.I., Gopasyuk, S.I., and Ogir’, M.B., Electric currents and H-alpha emission in two active regions on the Sun, Sol. Phys., 1968, vol. 3, no. 2, pp. 282–297.
4. Abramenko, V.I., Gopasyuk, S.I., and Ogir’, M.B., Evolution of the active region, its current systems, and flare activity, Izv. Krym. Astrofiz. Obs., 1988, vol. 78, pp. 151–170.
5. Moreton, G.E. and Severny, A.B., Magnetic fields and flares in the region CMP 20 September 1963, Sol. Phys., 1968, vol. 3, no. 2, pp. 282–297.