| article html file updated | 8 February 2020 06:45 CET | Update | https://www.mdpi.com/2079-9292/6/2/42 |
| article html file updated | 25 September 2019 00:37 CEST | Update | - |
| article html file updated | 3 May 2019 20:19 CEST | Update | - |
| article html file updated | 28 June 2017 13:03 CEST | Update | - |
| article html file updated | 26 May 2017 06:07 CEST | Original file | - |
| article xml uploaded. | 26 May 2017 06:05 CEST | Update | https://www.mdpi.com/2079-9292/6/2/42/xml |
| article pdf uploaded. | 26 May 2017 06:05 CEST | Version of Record | https://www.mdpi.com/2079-9292/6/2/42/pdf |
