| article html file updated | 8 February 2020 08:06 CET | Update | https://www.mdpi.com/1999-4907/8/6/208 |
| article html file updated | 25 September 2019 07:28 CEST | Update | - |
| article html file updated | 3 May 2019 17:48 CEST | Update | - |
| article html file updated | 27 June 2017 11:19 CEST | Update | - |
| article html file updated | 15 June 2017 09:37 CEST | Original file | - |
| article xml uploaded. | 15 June 2017 09:35 CEST | Original file | https://www.mdpi.com/1999-4907/8/6/208/xml |
| article pdf uploaded. | 15 June 2017 09:35 CEST | Updated version of record | https://www.mdpi.com/1999-4907/8/6/208/pdf |
| article pdf uploaded. | 12 June 2017 14:01 CEST | Version of Record | https://www.mdpi.com/1999-4907/8/6/208/pdf-vor |
