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Journal of the Korean Physical Society > 2015 > 67 > 4 > 757-762
Journal of the Korean Physical Society > 2014 > 65 > 10 > 1691-1695
Journal of the Korean Physical Society > 2015 > 67 > 4 > 757-762
Journal of the Korean Physical Society > 2014 > 65 > 10 > 1691-1695