| article html file updated | 7 February 2020 15:06 CET | Update | https://www.mdpi.com/1999-4907/7/9/208 |
| article html file updated | 22 September 2019 01:06 CEST | Update | N/A |
| article html file updated | 5 May 2019 03:53 CEST | Update | N/A |
| article html file updated | 28 September 2016 07:24 CEST | Update | N/A |
| article html file updated | 16 September 2016 11:02 CEST | Original file | N/A |
| article xml uploaded. | 16 September 2016 11:01 CEST | Original file | https://www.mdpi.com/1999-4907/7/9/208/xml |
| article pdf uploaded. | 16 September 2016 11:01 CEST | Version of Record | https://www.mdpi.com/1999-4907/7/9/208/pdf |
