| article html file updated | 7 February 2020 23:45 CET | Update | https://www.mdpi.com/2072-6651/9/2/68 |
| article html file updated | 23 September 2019 09:56 CEST | Update | - |
| article html file updated | 4 May 2019 10:33 CEST | Update | - |
| article html file updated | 1 March 2017 03:46 CET | Update | - |
| article html file updated | 18 February 2017 12:23 CET | Original file | - |
| article xml uploaded. | 18 February 2017 12:22 CET | Original file | https://www.mdpi.com/2072-6651/9/2/68/xml |
| article pdf uploaded. | 18 February 2017 12:22 CET | Version of Record | https://www.mdpi.com/2072-6651/9/2/68/pdf |
