| article html file updated | 6 February 2020 07:13 CET | Update | https://www.mdpi.com/2072-6643/6/2/663 |
| article html file updated | 20 September 2019 05:49 CEST | Update | - |
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| article html file updated | 18 March 2014 09:55 CET | Original file | - |
| article xml file uploaded | 18 March 2014 09:55 CET | Original file | https://www.mdpi.com/2072-6643/6/2/663/xml |
| article pdf uploaded. | 12 February 2014 12:21 CET | Version of Record | https://www.mdpi.com/2072-6643/6/2/663/pdf |
