Journal of China University of Mining and Technology
Journal of China University of Mining and Technology > 2007 > 17 > 3 > 432-435
Journal of China University of Mining and Technology > 2008 > 18 > 2 > 296-299
Journal of China University of Mining and Technology > 2007 > 17 > 3 > 432-435
Journal of China University of Mining and Technology > 2008 > 18 > 2 > 296-299