| article html file updated | 7 February 2020 21:15 CET | Update | https://www.mdpi.com/2310-2861/3/1/5 |
| article html file updated | 4 May 2019 15:46 CEST | Update | - |
| article html file updated | 11 January 2017 11:32 CET | Original file | - |
| article xml uploaded. | 11 January 2017 11:31 CET | Original file | https://www.mdpi.com/2310-2861/3/1/5/xml |
| article pdf uploaded. | 11 January 2017 11:31 CET | Version of Record | https://www.mdpi.com/2310-2861/3/1/5/pdf |
