| article html file updated | 8 February 2020 03:42 CET | Update | https://www.mdpi.com/1999-4915/9/4/81 |
| article html file updated | 24 September 2019 08:29 CEST | Update | - |
| article html file updated | 4 May 2019 02:00 CEST | Update | - |
| article html file updated | 29 April 2017 05:53 CEST | Update | - |
| article html file updated | 19 April 2017 05:07 CEST | Original file | - |
| article xml uploaded. | 19 April 2017 05:05 CEST | Original file | https://www.mdpi.com/1999-4915/9/4/81/xml |
| article pdf uploaded. | 19 April 2017 05:05 CEST | Updated version of record | https://www.mdpi.com/1999-4915/9/4/81/pdf |
| article pdf uploaded. | 16 April 2017 12:14 CEST | Version of Record | https://www.mdpi.com/1999-4915/9/4/81/pdf-vor |
