Journal of China University of Mining and Technology
Journal of China University of Mining and Technology > 2007 > 17 > 1 > 105-111
Journal of China University of Mining and Technology > 2007 > 17 > 2 > 242-245
Journal of China University of Mining and Technology > 2007 > 17 > 1 > 105-111
Journal of China University of Mining and Technology > 2007 > 17 > 2 > 242-245