| article html file updated | 7 February 2020 08:45 CET | Update | https://www.mdpi.com/2079-9268/6/2/7 |
| article html file updated | 5 May 2019 15:42 CEST | Update | N/A |
| article html file updated | 27 March 2019 04:48 CET | Update | N/A |
| article html file updated | 16 May 2016 11:24 CEST | Original file | N/A |
| article xml uploaded. | 16 May 2016 11:22 CEST | Original file | https://www.mdpi.com/2079-9268/6/2/7/xml |
| article pdf uploaded. | 16 May 2016 11:22 CEST | Version of Record | https://www.mdpi.com/2079-9268/6/2/7/pdf |
