| article html file updated | 7 February 2020 19:07 CET | Update | https://www.mdpi.com/2077-0375/6/4/50 |
| article html file updated | 22 September 2019 08:56 CEST | Update | N/A |
| article html file updated | 4 May 2019 20:18 CEST | Update | N/A |
| article html file updated | 28 December 2016 07:59 CET | Update | N/A |
| article html file updated | 6 December 2016 08:24 CET | Original file | N/A |
| article xml uploaded. | 6 December 2016 08:23 CET | Update | https://www.mdpi.com/2077-0375/6/4/50/xml |
| article xml uploaded. | 6 December 2016 08:23 CET | Original file | N/A |
| article pdf uploaded. | 6 December 2016 08:23 CET | Version of Record | https://www.mdpi.com/2077-0375/6/4/50/pdf |
