AirForce:10.1143/APEX.1.066004
AirForce:10.1143/JJAP.36.1330
AirForce:10.1143/JJAP.37.L36
AirForce:10.1143/JJAP.39.789
AirForce:10.1143/JJAP.40.6235
AirForce:10.1143/JJAP.41.949
AirForce:10.1143/JJAP.41.19361
AirForce:10.1143/JJAP.42.1590
AirForce:10.1143/JJAP.43.7444
AirForce:10.1143/JJAP.44.L150