| article html file updated | 7 February 2020 12:00 CET | Update | https://www.mdpi.com/2079-3200/4/3/9 |
| article html file updated | 5 May 2019 09:36 CEST | Update | N/A |
| article html file updated | 27 March 2019 10:52 CET | Update | N/A |
| article html file updated | 20 July 2016 14:01 CEST | Original file | N/A |
| article xml uploaded. | 20 July 2016 14:00 CEST | Original file | https://www.mdpi.com/2079-3200/4/3/9/xml |
| article pdf uploaded. | 20 July 2016 14:00 CEST | Version of Record | https://www.mdpi.com/2079-3200/4/3/9/pdf |
