| article html file updated | 7 February 2020 02:59 CET | Update | https://www.mdpi.com/1996-1944/9/1/15 |
| article html file updated | 6 May 2019 03:27 CEST | Update | N/A |
| article html file updated | 26 March 2019 17:38 CET | Update | N/A |
| article html file updated | 12 May 2017 09:23 CEST | Original file | N/A |
| article xml uploaded. | 12 May 2017 09:21 CEST | Update | https://www.mdpi.com/1996-1944/9/1/15/xml |
| article pdf uploaded. | 12 May 2017 09:21 CEST | Updated version of record | https://www.mdpi.com/1996-1944/9/1/15/pdf |
| article pdf uploaded. | 2 January 2016 10:49 CET | Version of Record | https://www.mdpi.com/1996-1944/9/1/15/pdf-vor |
