AirForce:10.1577/1548-8446(1987)012<0014:TEARPO>2.0.CO;2
AirForce:10.1577/1548-8659(1980)109<304:H>2.0.CO;2
AirForce:10.1577/1548-8659(1983)112<100:EOHOFM>2.0.CO;2