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. Dragt A J. AIP Conference proceedings, 1982, 87: 147-3102. L Jian-Qin, LI Jin-Hai. Progress in Natural Science, 2004, 16(6): 667-672
. Dragt A J. AIP Conference proceedings, 1982, 87: 147-3102. L Jian-Qin, LI Jin-Hai. Progress in Natural Science, 2004, 16(6): 667-672