| article html file updated | 7 February 2020 22:39 CET | Update | https://www.mdpi.com/2072-6643/9/2/109 |
| article html file updated | 23 September 2019 03:45 CEST | Update | - |
| article html file updated | 4 May 2019 12:45 CEST | Update | - |
| article html file updated | 2 March 2017 03:46 CET | Update | - |
| article html file updated | 4 February 2017 09:21 CET | Original file | - |
| article xml uploaded. | 4 February 2017 09:20 CET | Original file | https://www.mdpi.com/2072-6643/9/2/109/xml |
| article pdf uploaded. | 4 February 2017 09:20 CET | Version of Record | https://www.mdpi.com/2072-6643/9/2/109/pdf |
