DOE:10.2747/0020-6814.48.8.669 DOE:10.2747/0020-6814.50.11.959 DOE:10.2747/0272-3646.33.2.105 DOE:10.2747/1060-586X.18.3.183 DOE:10.2747/1538-7216.47.3.285 DOE:10.2747/1548-1603.48.1.74 DOE:10.2747/1548-1603.49.2.275 DOE:10.2747/1548-1603.49.4.463 DOE:10.2747/1548-1603.49.4.492