| article html file updated | 7 February 2020 21:02 CET | Update | https://www.mdpi.com/2073-4352/7/1/18 |
| article html file updated | 22 September 2019 19:23 CEST | Update | - |
| article html file updated | 4 May 2019 16:14 CEST | Update | - |
| article html file updated | 7 February 2017 04:11 CET | Update | - |
| article html file updated | 9 January 2017 09:59 CET | Original file | - |
| article xml uploaded. | 9 January 2017 09:58 CET | Original file | https://www.mdpi.com/2073-4352/7/1/18/xml |
| article pdf uploaded. | 9 January 2017 09:58 CET | Version of Record | https://www.mdpi.com/2073-4352/7/1/18/pdf |
