Transactions of Tianjin University
Transactions of Tianjin University > 2011 > 17 > 4 > 284-287
Transactions of Tianjin University > 2011 > 17 > 5 > 362-368
Transactions of Tianjin University > 2011 > 17 > 4 > 284-287
Transactions of Tianjin University > 2011 > 17 > 5 > 362-368