Journal of the Korean Physical Society
Journal of the Korean Physical Society > 2013 > 63 > 3 > 563-566
Journal of the Korean Physical Society > 2013 > 63 > 3 > 559-562
Journal of the Korean Physical Society > 2013 > 63 > 3 > 563-566
Journal of the Korean Physical Society > 2013 > 63 > 3 > 559-562