| article html file updated | 8 February 2020 08:54 CET | Update | https://www.mdpi.com/1999-4915/9/6/157 |
| article html file updated | 25 September 2019 11:39 CEST | Update | N/A |
| article html file updated | 3 May 2019 16:17 CEST | Update | N/A |
| article html file updated | 7 July 2017 03:21 CEST | Update | N/A |
| article xml uploaded. | 7 July 2017 03:20 CEST | Update | https://www.mdpi.com/1999-4915/9/6/157/xml |
| article pdf uploaded. | 7 July 2017 03:20 CEST | Updated version of record | https://www.mdpi.com/1999-4915/9/6/157/pdf |
| article html file updated | 29 June 2017 12:02 CEST | Update | N/A |
| article html file updated | 21 June 2017 14:57 CEST | Original file | N/A |
| article pdf uploaded. | 21 June 2017 14:56 CEST | Version of Record | https://www.mdpi.com/1999-4915/9/6/157/pdf-vor |
