Fransson C., J. Larsson, J. Spyromilio, R.A. Chevalier, P. Gröningsson, A. Jerkstrand, B. Leibundgut, R.A. McCray, P.M. Challis, R. Kirshner, and K. Kjaer, The Astrophysical Journal768, 88(2013).
Larsson J., C. Fransson, G. Östlin, P. Gröningsson, A. Jerkstrand, C. Kozma, J. Sollerman, P.M. Challis, R. Kirshner, R.A. Chevalier, and K. Heng, Nature474, 484\textendash486(2011).