| article html file updated | 7 February 2020 18:34 CET | Update | https://www.mdpi.com/1424-8220/16/12/1994 |
| article html file updated | 4 May 2019 21:25 CEST | Update | N/A |
| article html file updated | 27 December 2016 12:37 CET | Update | N/A |
| article html file updated | 25 November 2016 03:41 CET | Original file | N/A |
| article xml uploaded. | 25 November 2016 03:40 CET | Update | https://www.mdpi.com/1424-8220/16/12/1994/xml |
| article xml uploaded. | 25 November 2016 03:40 CET | Original file | N/A |
| article pdf uploaded. | 25 November 2016 03:40 CET | Version of Record | https://www.mdpi.com/1424-8220/16/12/1994/pdf |
