| article html file updated | 7 February 2020 10:28 CET | Update | https://www.mdpi.com/1424-8220/16/6/921 |
| article html file updated | 5 May 2019 12:21 CEST | Update | N/A |
| article html file updated | 27 March 2019 08:02 CET | Update | N/A |
| article html file updated | 29 June 2016 11:09 CEST | Update | N/A |
| article html file updated | 21 June 2016 10:44 CEST | Original file | N/A |
| article xml uploaded. | 21 June 2016 10:42 CEST | Original file | https://www.mdpi.com/1424-8220/16/6/921/xml |
| article pdf uploaded. | 21 June 2016 10:42 CEST | Version of Record | https://www.mdpi.com/1424-8220/16/6/921/pdf |
