| article html file updated | 8 February 2020 08:54 CET | Update | https://www.mdpi.com/1999-4915/9/6/156 |
| article html file updated | 25 September 2019 11:38 CEST | Update | - |
| article html file updated | 3 May 2019 16:18 CEST | Update | - |
| article html file updated | 29 June 2017 12:02 CEST | Update | - |
| article html file updated | 21 June 2017 14:43 CEST | Original file | - |
| article xml uploaded. | 21 June 2017 14:42 CEST | Original file | https://www.mdpi.com/1999-4915/9/6/156/xml |
| article pdf uploaded. | 21 June 2017 14:42 CEST | Version of Record | https://www.mdpi.com/1999-4915/9/6/156/pdf |
