[1] Teriaca L, Banerjee D, Falchi A, et al. A&A, 2004, 427: 1065.
[2] Zhang M, Xia L D, Tian H, et al. A&A, 2010, 520: 37.
[3] Ning Z, Innes D E, Solanki S K. A&A, 2004, 419: 1141.
[4] Innes D E, Inhester B, Axford W I, et al. Nature, 1997, 386: 811.
[5] Doyle J G, Popescu M D, Taroyan Y. A&A, 2006, 446: 327.
[6] Winebarger A R, Emslie A G, Mariska J T, et al. ApJ, 2002, 565: 1298.
[7] Lin Y, Engvold O, Rouppe van der Voort, et al. Solar Phys., 2005, 226: 239.
[8] Liu K, Wang Y M, Shen C L, et al. ApJL, 2012, 744: 168.
[9] Olmedo O, Zhang J. ApJ, 2010, 718: 433.
[10] Berger T, Testa P, Hillier A, et al. Nature, 2011, 472: 197.
[11] Wilhelm K, Curdt W, Marsch E, et al. Solar Phys., 1995, 162: 189.
[12] Wilhelm K, Lemaire P, Curdt W, et al. Solar Phys., 1997, 170: 75.
[13] Dammasch I E, Wilhelm K, Curdt W, et al. A&A, 1999, 346: 285.
[14] Zhang Min, Wang Dong, Liu Guohong. Spectroscopy and Spectral Analysis, 2014, 34(7): 1890.
[15] Chen P F, Innes D E, Solanki S K. A&A, 2008, 484: 487.
[16] Dere K P. Adv. Space. Res., 1994, 14: 13.
[17] Innes D E, Brekke P, Germerott D, et al. Sol. Phys., 1997, 175: 341.
[18] Tian H, McIntosh S W, De Pontieu B. ApJL, 2011, 727: 37.