| article html file updated | 8 February 2020 03:14 CET | Update | https://www.mdpi.com/1999-4915/9/4/74 |
| article html file updated | 24 September 2019 05:52 CEST | Update | - |
| article html file updated | 4 May 2019 02:52 CEST | Update | - |
| article html file updated | 29 April 2017 05:52 CEST | Update | - |
| article html file updated | 10 April 2017 11:12 CEST | Original file | - |
| article xml uploaded. | 10 April 2017 11:10 CEST | Original file | https://www.mdpi.com/1999-4915/9/4/74/xml |
| article pdf uploaded. | 10 April 2017 11:10 CEST | Version of Record | https://www.mdpi.com/1999-4915/9/4/74/pdf |
