Army:10.1562/0031-8655(2000)071<0090:VPISFH>2.0.CO;2
Army:10.1562/0031-8655(2001)073<0621:UDOA>2.0.CO;2
Army:10.1562/0031-8655(2003)077<0058:UPFFCA>2.0.CO;2
Army:10.1562/2005-02-14-RA-439.1
Army:10.1562/2006-11-14-RA-1081