| article html file updated | 7 February 2020 20:10 CET | Update | https://www.mdpi.com/1424-8220/17/1/15 |
| article html file updated | 22 September 2019 14:29 CEST | Update | N/A |
| article html file updated | 4 May 2019 18:05 CEST | Update | N/A |
| article html file updated | 8 February 2017 08:39 CET | Update | N/A |
| article html file updated | 23 December 2016 07:37 CET | Original file | N/A |
| article xml uploaded. | 23 December 2016 07:36 CET | Update | https://www.mdpi.com/1424-8220/17/1/15/xml |
| article xml uploaded. | 23 December 2016 07:36 CET | Original file | N/A |
| article pdf uploaded. | 23 December 2016 07:36 CET | Version of Record | https://www.mdpi.com/1424-8220/17/1/15/pdf |
