What is the source of the magnetic helicity shed by CMEs? The long-term helicity budget of AR 7978P. Démoulin, C. H. Mandrini, L. van Driel-Gesztelyi, B. J. Thompson, S. Plunkett, Zs. Kővári, G. Aulanier and A. YoungA&A, 382 2 (2002) 650-665DOI: https://doi.org/10.1051/0004-6361:20011634
