| article html file updated | 7 February 2020 20:49 CET | Update | https://www.mdpi.com/2073-4433/8/1/4 |
| article html file updated | 22 September 2019 18:07 CEST | Update | N/A |
| article html file updated | 4 May 2019 16:42 CEST | Update | N/A |
| article html file updated | 7 February 2017 03:31 CET | Update | N/A |
| article html file updated | 5 January 2017 09:22 CET | Original file | N/A |
| article xml uploaded. | 5 January 2017 09:21 CET | Update | https://www.mdpi.com/2073-4433/8/1/4/xml |
| article pdf uploaded. | 5 January 2017 09:21 CET | Version of Record | https://www.mdpi.com/2073-4433/8/1/4/pdf |
