| article html file updated | 7 February 2020 22:40 CET | Update | https://www.mdpi.com/2072-6643/9/2/108 |
| article html file updated | 23 September 2019 03:51 CEST | Update | - |
| article html file updated | 4 May 2019 12:43 CEST | Update | - |
| article html file updated | 2 March 2017 03:46 CET | Update | - |
| article html file updated | 4 February 2017 10:17 CET | Original file | - |
| article xml uploaded. | 4 February 2017 10:15 CET | Original file | https://www.mdpi.com/2072-6643/9/2/108/xml |
| article pdf uploaded. | 4 February 2017 10:15 CET | Version of Record | https://www.mdpi.com/2072-6643/9/2/108/pdf |
