| article html file updated | 8 February 2020 02:50 CET | Update | https://www.mdpi.com/1999-4915/9/4/69 |
| article html file updated | 24 September 2019 03:40 CEST | Update | - |
| article html file updated | 4 May 2019 03:44 CEST | Update | - |
| article html file updated | 29 April 2017 05:52 CEST | Update | - |
| article html file updated | 6 April 2017 13:41 CEST | Original file | - |
| article xml uploaded. | 6 April 2017 13:40 CEST | Original file | https://www.mdpi.com/1999-4915/9/4/69/xml |
| article pdf uploaded. | 6 April 2017 13:40 CEST | Updated version of record | https://www.mdpi.com/1999-4915/9/4/69/pdf |
| article pdf uploaded. | 3 April 2017 10:08 CEST | Version of Record | https://www.mdpi.com/1999-4915/9/4/69/pdf-vor |
