| article html file updated | 6 February 2020 14:14 CET | Update | https://www.mdpi.com/1424-2818/6/4/771 |
| article html file updated | 7 May 2019 04:23 CEST | Update | - |
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| article xml file uploaded | 24 December 2014 05:21 CET | Original file | https://www.mdpi.com/1424-2818/6/4/771/xml |
| article pdf uploaded. | 5 December 2014 15:15 CET | Version of Record | https://www.mdpi.com/1424-2818/6/4/771/pdf |
