| article html file updated | 7 February 2020 22:19 CET | Update | https://www.mdpi.com/1999-4907/8/2/33 |
| article html file updated | 23 September 2019 02:01 CEST | Update | - |
| article html file updated | 4 May 2019 13:25 CEST | Update | - |
| article html file updated | 28 February 2017 10:49 CET | Update | - |
| article html file updated | 10 February 2017 06:30 CET | Original file | - |
| article xml uploaded. | 10 February 2017 06:29 CET | Update | https://www.mdpi.com/1999-4907/8/2/33/xml |
| article xml uploaded. | 10 February 2017 06:28 CET | Original file | - |
| article pdf uploaded. | 10 February 2017 06:28 CET | Updated version of record | https://www.mdpi.com/1999-4907/8/2/33/pdf |
| article pdf uploaded. | 26 January 2017 12:23 CET | Version of Record | https://www.mdpi.com/1999-4907/8/2/33/pdf-vor |
