| article html file updated | 7 February 2020 21:41 CET | Update | https://www.mdpi.com/2077-0375/7/1/4 |
| article html file updated | 22 September 2019 22:34 CEST | Update | N/A |
| article html file updated | 4 May 2019 14:44 CEST | Update | N/A |
| article html file updated | 30 March 2017 10:57 CEST | Update | N/A |
| article html file updated | 23 February 2017 11:14 CET | Update | N/A |
| article xml uploaded. | 23 February 2017 11:13 CET | Update | https://www.mdpi.com/2077-0375/7/1/4/xml |
| article xml uploaded. | 23 February 2017 11:13 CET | Update | N/A |
| article pdf uploaded. | 23 February 2017 11:13 CET | Updated version of record | https://www.mdpi.com/2077-0375/7/1/4/pdf |
| article html file updated | 18 January 2017 09:25 CET | Original file | N/A |
| article xml uploaded. | 18 January 2017 09:23 CET | Update | N/A |
| article xml uploaded. | 18 January 2017 09:23 CET | Original file | N/A |
| article pdf uploaded. | 18 January 2017 09:23 CET | Version of Record | https://www.mdpi.com/2077-0375/7/1/4/pdf-vor |
