| article html file updated | 7 February 2020 21:07 CET | Update | https://www.mdpi.com/2072-6643/9/1/56 |
| article html file updated | 22 September 2019 19:41 CEST | Update | - |
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| article html file updated | 7 February 2017 12:29 CET | Update | - |
| article html file updated | 10 January 2017 13:20 CET | Original file | - |
| article xml uploaded. | 10 January 2017 13:18 CET | Original file | https://www.mdpi.com/2072-6643/9/1/56/xml |
| article pdf uploaded. | 10 January 2017 13:18 CET | Version of Record | https://www.mdpi.com/2072-6643/9/1/56/pdf |
