| article html file updated | 9 February 2020 00:08 CET | Update | https://www.mdpi.com/2079-9292/6/4/109 |
| article html file updated | 29 September 2019 05:31 CEST | Update | - |
| article html file updated | 2 May 2019 08:28 CEST | Update | - |
| article html file updated | 18 April 2019 06:14 CEST | Update | - |
| article html file updated | 2 January 2018 11:30 CET | Update | - |
| article html file updated | 14 December 2017 16:03 CET | Original file | - |
| article xml uploaded. | 14 December 2017 16:02 CET | Update | https://www.mdpi.com/2079-9292/6/4/109/xml |
| article xml uploaded. | 14 December 2017 16:02 CET | Update | - |
| article xml uploaded. | 14 December 2017 16:01 CET | Original file | - |
| article pdf uploaded. | 14 December 2017 16:01 CET | Version of Record | https://www.mdpi.com/2079-9292/6/4/109/pdf |
