| article html file updated | 7 February 2020 04:29 CET | Update | https://www.mdpi.com/1999-4907/7/2/40 |
| article html file updated | 6 May 2019 00:31 CEST | Update | - |
| article html file updated | 26 March 2019 20:34 CET | Original file | - |
| article pdf uploaded. | 19 February 2016 07:30 CET | Updated version of record | https://www.mdpi.com/1999-4907/7/2/40/pdf |
| article xml uploaded. | 19 February 2016 07:30 CET | Original file | https://www.mdpi.com/1999-4907/7/2/40/xml |
| article pdf uploaded. | 9 February 2016 09:44 CET | Version of Record | https://www.mdpi.com/1999-4907/7/2/40/pdf-vor |
