| article html file updated | 8 February 2020 10:47 CET | Update | https://www.mdpi.com/2227-9709/4/3/20 |
| article html file updated | 25 September 2019 21:36 CEST | Update | - |
| article html file updated | 3 May 2019 12:47 CEST | Update | - |
| article html file updated | 27 October 2017 10:26 CEST | Update | - |
| article html file updated | 12 July 2017 11:18 CEST | Original file | - |
| article xml uploaded. | 12 July 2017 11:17 CEST | Update | https://www.mdpi.com/2227-9709/4/3/20/xml |
| article pdf uploaded. | 12 July 2017 11:17 CEST | Version of Record | https://www.mdpi.com/2227-9709/4/3/20/pdf |
