| article html file updated | 9 February 2020 05:51 CET | Update | https://www.mdpi.com/1424-8220/18/2/503 |
| article html file updated | 30 September 2019 14:43 CEST | Update | - |
| article html file updated | 1 May 2019 20:13 CEST | Update | - |
| article html file updated | 17 April 2019 19:17 CEST | Update | - |
| article html file updated | 28 March 2019 21:39 CET | Update | - |
| article html file updated | 14 March 2018 19:25 CET | Update | - |
| article html file updated | 7 February 2018 13:07 CET | Original file | - |
| article xml uploaded. | 7 February 2018 13:06 CET | Original file | https://www.mdpi.com/1424-8220/18/2/503/xml |
| article pdf uploaded. | 7 February 2018 13:06 CET | Version of Record | https://www.mdpi.com/1424-8220/18/2/503/pdf |
