NASA:10.2747/0272-3646.29.2.158
NASA:10.2747/0272-3646.29.6.529
NASA:10.2747/0272-3646.30.6.517
NASA:10.2747/1548-1603.43.1.39
NASA:10.2747/1548-1603.44.2.182
NASA:10.2747/1548-1603.44.4.320
NASA:10.2747/1548-1603.44.4.334
NASA:10.2747/1548-1603.49.2.182