AirForce:10.1070/QE2001v031n01ABEH001886
AirForce:10.1070/QE2001v031n08ABEH002026
AirForce:10.1070/QE2003v033n03ABEH002387
AirForce:10.1070/QE2003v033n03ABEH002388
AirForce:10.1070/QE2004v034n09ABEH002883
AirForce:10.1070/QE2005v035n12ABEH013036
AirForce:10.1070/QE2006v036n12ABEH013330