%0 Conference Article %T Investigation of magnetic free energy dynamics in the M1.2-class complex solar flare of March 15, 2015 using the 135-second HMI vector magnetograms %A Sharykin, I.. %A Zimovets, I.. %A Myshyakov, I.. %A Anfinogentov, S.. %K Sun: solar flares, magnetic fields; electric currents; eruption; hard X-ray emission %J Modern astronomy: from the Early Universe to exoplanets and black holes %D 2024 %P 3 %I Special Astrophysical Observatory of the Russian Academy of Sciences