| article html file updated | 8 February 2020 06:28 CET | Update | https://www.mdpi.com/2227-7080/5/2/23 |
| article html file updated | 24 September 2019 23:05 CEST | Update | - |
| article html file updated | 3 May 2019 20:52 CEST | Update | - |
| article html file updated | 29 June 2017 11:55 CEST | Update | - |
| article html file updated | 23 May 2017 15:11 CEST | Original file | - |
| article xml uploaded. | 23 May 2017 15:10 CEST | Original file | https://www.mdpi.com/2227-7080/5/2/23/xml |
| article pdf uploaded. | 23 May 2017 15:10 CEST | Version of Record | https://www.mdpi.com/2227-7080/5/2/23/pdf |
