| article html file updated | 7 February 2020 03:52 CET | Update | https://www.mdpi.com/2308-3425/3/1/4 |
| article html file updated | 21 September 2019 10:19 CEST | Update | - |
| article html file updated | 6 May 2019 01:45 CEST | Update | - |
| article html file updated | 26 March 2019 19:20 CET | Original file | - |
| article xml uploaded. | 26 January 2016 09:20 CET | Original file | https://www.mdpi.com/2308-3425/3/1/4/xml |
| article pdf uploaded. | 26 January 2016 09:20 CET | Version of Record | https://www.mdpi.com/2308-3425/3/1/4/pdf |
