AirForce:10.1524/zkri.1977.146.4-6.205
AirForce:10.1524/zpch.219.5.699.64320
AirForce:10.1524/zpch.219.5.715.64322
AirForce:10.1524/zpch.2000.214.9.1279
AirForce:10.1524/zpch.2011.0187