| article html file updated | 7 February 2020 20:29 CET | Update | https://www.mdpi.com/2072-666X/8/1/9 |
| article html file updated | 22 September 2019 16:13 CEST | Update | - |
| article html file updated | 4 May 2019 17:26 CEST | Update | - |
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| article html file updated | 29 December 2016 11:12 CET | Original file | - |
| article xml uploaded. | 29 December 2016 11:04 CET | Update | https://www.mdpi.com/2072-666X/8/1/9/xml |
| article xml uploaded. | 29 December 2016 11:04 CET | Original file | - |
| article pdf uploaded. | 29 December 2016 11:04 CET | Version of Record | https://www.mdpi.com/2072-666X/8/1/9/pdf |
