| article html file updated | 8 February 2020 17:33 CET | Update | https://www.mdpi.com/2079-9292/6/4/74 |
| article html file updated | 2 May 2019 23:14 CEST | Update | N/A |
| article html file updated | 2 January 2018 11:24 CET | Update | N/A |
| article html file updated | 1 October 2017 05:01 CEST | Original file | N/A |
| article xml uploaded. | 1 October 2017 05:00 CEST | Update | https://www.mdpi.com/2079-9292/6/4/74/xml |
| article xml uploaded. | 1 October 2017 05:00 CEST | Original file | N/A |
| article pdf uploaded. | 1 October 2017 05:00 CEST | Updated version of record | https://www.mdpi.com/2079-9292/6/4/74/pdf |
| article pdf uploaded. | 30 September 2017 10:28 CEST | Version of Record | https://www.mdpi.com/2079-9292/6/4/74/pdf-vor |
