| article html file updated | 7 February 2020 21:56 CET | Update | https://www.mdpi.com/1999-4915/9/1/19 |
| article html file updated | 22 September 2019 23:55 CEST | Update | - |
| article html file updated | 4 May 2019 14:10 CEST | Update | - |
| article html file updated | 7 February 2017 12:26 CET | Update | - |
| article html file updated | 21 January 2017 08:20 CET | Original file | - |
| article xml uploaded. | 21 January 2017 08:19 CET | Original file | https://www.mdpi.com/1999-4915/9/1/19/xml |
| article pdf uploaded. | 21 January 2017 08:19 CET | Version of Record | https://www.mdpi.com/1999-4915/9/1/19/pdf |
