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Wiegelmann, T.: Solar magnetic fields: Triple arcade structures. Physica Scripta T74, S. 77 - 81 (1998)

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Wilhelm, K.; Lemaire, P.; Dammasch, I. E.; Hollandt, J.; Schühle, U.; Curdt, W.; Kucera, T.; Hassler, D. M.; Huber, M. C. E.: Solar irradiances and radiances of UV and EUV lines during the minimum of the sunspot activity in 1996. Astronomy and Astrophysics 334, S. 685 - 702 (1998)

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