| article html file updated | 7 February 2020 20:21 CET | Update | https://www.mdpi.com/2073-4425/8/1/9 |
| article html file updated | 22 September 2019 15:30 CEST | Update | N/A |
| article html file updated | 4 May 2019 17:42 CEST | Update | N/A |
| article html file updated | 7 February 2017 12:17 CET | Update | N/A |
| article html file updated | 27 December 2016 10:25 CET | Original file | N/A |
| article xml uploaded. | 27 December 2016 10:24 CET | Update | https://www.mdpi.com/2073-4425/8/1/9/xml |
| article xml uploaded. | 27 December 2016 10:24 CET | Original file | N/A |
| article pdf uploaded. | 27 December 2016 10:24 CET | Version of Record | https://www.mdpi.com/2073-4425/8/1/9/pdf |
