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| 0001432093-12-000312.txt | 2012-05-07 17:52:18 | |
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| vertex10q033112.htm | 721365 | 2012-05-07 17:52:18 |
| vtnrpk-20120331.xml | 207445 | 2012-05-07 17:52:18 |
| vtnrpk-20120331.xsd | 11622 | 2012-05-07 17:52:18 |
| vtnrpk-20120331_cal.xml | 22846 | 2012-05-07 17:52:18 |
| vtnrpk-20120331_def.xml | 13064 | 2012-05-07 17:52:18 |
| vtnrpk-20120331_lab.xml | 93424 | 2012-05-07 17:52:18 |
| vtnrpk-20120331_pre.xml | 62534 | 2012-05-07 17:52:18 |