| article html file updated | 7 February 2020 21:31 CET | Update | https://www.mdpi.com/2072-6643/9/1/31 |
| article html file updated | 22 September 2019 21:43 CEST | Update | - |
| article html file updated | 4 May 2019 15:11 CEST | Update | - |
| article html file updated | 7 February 2017 12:23 CET | Update | - |
| article html file updated | 15 January 2017 04:29 CET | Original file | - |
| article xml uploaded. | 15 January 2017 04:28 CET | Update | https://www.mdpi.com/2072-6643/9/1/31/xml |
| article xml uploaded. | 15 January 2017 04:28 CET | Original file | - |
| article pdf uploaded. | 15 January 2017 04:28 CET | Version of Record | https://www.mdpi.com/2072-6643/9/1/31/pdf |
