| article html file updated | 7 February 2020 05:41 CET | Update | https://www.mdpi.com/2308-3425/3/1/9 |
| article html file updated | 5 May 2019 21:55 CEST | Update | N/A |
| article html file updated | 26 March 2019 23:03 CET | Original file | N/A |
| article pdf uploaded. | 10 March 2016 09:26 CET | Version of Record | https://www.mdpi.com/2308-3425/3/1/9/pdf |
| article xml uploaded. | 10 March 2016 09:26 CET | Original file | https://www.mdpi.com/2308-3425/3/1/9/xml |
