| article html file updated | 7 February 2020 22:20 CET | Update | https://www.mdpi.com/1999-4907/8/2/34 |
| article html file updated | 23 September 2019 02:05 CEST | Update | - |
| article html file updated | 4 May 2019 13:23 CEST | Update | - |
| article html file updated | 28 February 2017 10:50 CET | Update | - |
| article html file updated | 10 February 2017 06:31 CET | Original file | - |
| article xml uploaded. | 10 February 2017 06:29 CET | Update | https://www.mdpi.com/1999-4907/8/2/34/xml |
| article xml uploaded. | 10 February 2017 06:29 CET | Original file | - |
| article pdf uploaded. | 10 February 2017 06:29 CET | Updated version of record | https://www.mdpi.com/1999-4907/8/2/34/pdf |
| article pdf uploaded. | 29 January 2017 08:32 CET | Version of Record | https://www.mdpi.com/1999-4907/8/2/34/pdf-vor |
