| article html file updated | 7 February 2020 16:36 CET | Update | https://www.mdpi.com/2077-0375/6/4/45 |
| article html file updated | 22 September 2019 03:23 CEST | Update | - |
| article html file updated | 5 May 2019 01:10 CEST | Update | - |
| article html file updated | 28 December 2016 07:56 CET | Update | - |
| article html file updated | 19 October 2016 11:36 CEST | Original file | - |
| article xml uploaded. | 19 October 2016 11:35 CEST | Update | https://www.mdpi.com/2077-0375/6/4/45/xml |
| article xml uploaded. | 19 October 2016 11:35 CEST | Original file | - |
| article pdf uploaded. | 19 October 2016 11:35 CEST | Version of Record | https://www.mdpi.com/2077-0375/6/4/45/pdf |
