| article html file updated | 8 February 2020 08:01 CET | Update | https://www.mdpi.com/2227-7080/5/2/34 |
| article html file updated | 25 September 2019 06:59 CEST | Update | - |
| article html file updated | 3 May 2019 17:58 CEST | Update | - |
| article html file updated | 29 June 2017 11:58 CEST | Update | - |
| article html file updated | 10 June 2017 13:57 CEST | Original file | - |
| article xml uploaded. | 10 June 2017 13:56 CEST | Update | https://www.mdpi.com/2227-7080/5/2/34/xml |
| article pdf uploaded. | 10 June 2017 13:56 CEST | Version of Record | https://www.mdpi.com/2227-7080/5/2/34/pdf |
