| article html file updated | 7 February 2020 07:15 CET | Update | https://www.mdpi.com/2079-4983/7/2/9 |
| article html file updated | 21 September 2019 15:06 CEST | Update | - |
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| article xml uploaded. | 16 April 2016 02:54 CEST | Update | https://www.mdpi.com/2079-4983/7/2/9/xml |
| article pdf uploaded. | 16 April 2016 02:54 CEST | Updated version of record | https://www.mdpi.com/2079-4983/7/2/9/pdf |
| article html file updated | 14 April 2016 10:28 CEST | Original file | - |
| article pdf uploaded. | 14 April 2016 10:26 CEST | Version of Record | https://www.mdpi.com/2079-4983/7/2/9/pdf-vor |
