| article html file updated | 8 February 2020 15:37 CET | Update | https://www.mdpi.com/1999-4907/8/9/331 |
| article html file updated | 27 September 2019 00:24 CEST | Update | - |
| article html file updated | 3 May 2019 03:01 CEST | Update | - |
| article html file updated | 30 September 2017 10:23 CEST | Update | - |
| article html file updated | 7 September 2017 15:10 CEST | Original file | - |
| article xml uploaded. | 7 September 2017 15:09 CEST | Original file | https://www.mdpi.com/1999-4907/8/9/331/xml |
| article pdf uploaded. | 7 September 2017 15:09 CEST | Version of Record | https://www.mdpi.com/1999-4907/8/9/331/pdf |
