| article html file updated | 8 February 2020 08:51 CET | Update | https://www.mdpi.com/1999-4907/8/6/220 |
| article html file updated | 25 September 2019 11:22 CEST | Update | - |
| article html file updated | 3 May 2019 16:24 CEST | Update | - |
| article html file updated | 27 June 2017 11:21 CEST | Update | - |
| article html file updated | 22 June 2017 13:18 CEST | Original file | - |
| article xml uploaded. | 22 June 2017 13:16 CEST | Original file | https://www.mdpi.com/1999-4907/8/6/220/xml |
| article pdf uploaded. | 22 June 2017 13:16 CEST | Updated version of record | https://www.mdpi.com/1999-4907/8/6/220/pdf |
| article pdf uploaded. | 21 June 2017 15:43 CEST | Version of Record | https://www.mdpi.com/1999-4907/8/6/220/pdf-vor |
