| article html file updated | 7 February 2020 23:21 CET | Update | https://www.mdpi.com/2075-163X/7/2/20 |
| article html file updated | 23 September 2019 07:45 CEST | Update | - |
| article html file updated | 4 May 2019 11:19 CEST | Update | - |
| article html file updated | 1 March 2017 10:21 CET | Update | - |
| article html file updated | 14 February 2017 12:16 CET | Original file | - |
| article xml uploaded. | 14 February 2017 11:52 CET | Original file | https://www.mdpi.com/2075-163X/7/2/20/xml |
| article pdf uploaded. | 14 February 2017 11:52 CET | Version of Record | https://www.mdpi.com/2075-163X/7/2/20/pdf |
