| article html file updated | 6 February 2020 05:45 CET | Update | https://www.mdpi.com/1424-8247/6/12/1451 |
| article html file updated | 7 May 2019 21:43 CEST | Update | - |
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| article xml file uploaded | 7 January 2014 12:22 CET | Original file | https://www.mdpi.com/1424-8247/6/12/1451/xml |
| article pdf uploaded. | 25 November 2013 16:05 CET | Version of Record | https://www.mdpi.com/1424-8247/6/12/1451/pdf |
