平台:
ProQuest Literature Online
(Available from 2009/01/01 until 2010/12/31. Available from 2012/01/01 until 2013/12/31. Available from 2015/01/01 until 2015/01/31. Available from 2005/10/01 until 2007/12/31.)
ProQuest Literature Online
(Available from 2009/01/01 until 2010/12/31. Available from 2012/01/01 until 2013/12/31. Available from 2015/01/01 until 2015/01/31. Available from 2005/10/01 until 2007/12/31.)