| article html file updated | 7 February 2020 21:53 CET | Update | https://www.mdpi.com/2227-9067/4/1/5 |
| article html file updated | 22 September 2019 23:44 CEST | Update | - |
| article html file updated | 4 May 2019 14:15 CEST | Update | - |
| article html file updated | 16 February 2017 13:10 CET | Update | - |
| article xml uploaded. | 16 February 2017 13:09 CET | Update | https://www.mdpi.com/2227-9067/4/1/5/xml |
| article pdf uploaded. | 16 February 2017 13:09 CET | Updated version of record | https://www.mdpi.com/2227-9067/4/1/5/pdf |
| article html file updated | 9 February 2017 07:57 CET | Update | - |
| article html file updated | 20 January 2017 14:30 CET | Original file | - |
| article xml uploaded. | 20 January 2017 14:29 CET | Original file | - |
| article pdf uploaded. | 20 January 2017 14:29 CET | Version of Record | https://www.mdpi.com/2227-9067/4/1/5/pdf-vor |
