Literature

• The flares of April, 1980, Marcos E.Machado; Boris V.Somov, Advances in Space Research, Vol. 2, Issue 11, 1982, Pages 101-104 pdf
• An evidence of flare energy buildup and release related to magnetic shear and reconnection, Marcos E. Machado, Solar Physics, Vol. 99, 1985, pages 159–166 pdf