| article html file updated | 6 February 2020 08:34 CET | Update | https://www.mdpi.com/1424-8247/7/4/453 |
| article html file updated | 7 May 2019 15:57 CEST | Update | - |
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| article html file updated | 12 May 2014 15:32 CEST | Original file | - |
| article xml file uploaded | 12 May 2014 15:32 CEST | Original file | https://www.mdpi.com/1424-8247/7/4/453/xml |
| article pdf uploaded. | 14 April 2014 09:35 CEST | Version of Record | https://www.mdpi.com/1424-8247/7/4/453/pdf |
