[5] [5] Badenes C, Hughes J P, Cassamchenai G. Astrophysical Journal, 2012, 680(2): 1149.

[6] [6] Dubner G, Duvidovich L, Giacani E. Astrophysical Journal, 2016, 819(2): 98.

[7] [7] Bhanage R, Borde S, Joshi K. Co-Operative Communication with SNR Weighted Algorithm in Cognitive Radios, 2015 IEEE International Conference on Pervasive Computing, 2015.

[8] [8] Wang D L, Wang J G, Dong X B. Research in Astronomy and Astrophysics, 2012, 12(1): 509.

[9] [9] Subekti A, Rachmana N, Suksmono A B. Physical Review B, 2014, 12(3): 3895.

[10] [10] Hanabata Y, Katagiri H, Hewitt J W. Astrophysical Journal, 2014, 786(2): 86.