| article html file updated | 7 February 2020 06:45 CET | Update | https://www.mdpi.com/2079-4991/6/4/59 |
| article html file updated | 5 May 2019 19:45 CEST | Update | - |
| article html file updated | 27 March 2019 00:53 CET | Update | - |
| article html file updated | 24 February 2017 10:23 CET | Update | - |
| article html file updated | 29 April 2016 06:11 CEST | Update | - |
| article html file updated | 1 April 2016 14:49 CEST | Original file | - |
| article xml uploaded. | 1 April 2016 14:47 CEST | Update | https://www.mdpi.com/2079-4991/6/4/59/xml |
| article pdf uploaded. | 1 April 2016 14:47 CEST | Version of Record | https://www.mdpi.com/2079-4991/6/4/59/pdf |
