| article html file updated | 8 February 2020 08:48 CET | Update | https://www.mdpi.com/2227-9067/4/6/50 |
| article html file updated | 25 September 2019 11:08 CEST | Update | - |
| article html file updated | 3 May 2019 16:28 CEST | Update | - |
| article html file updated | 27 June 2017 10:01 CEST | Update | - |
| article html file updated | 22 June 2017 08:59 CEST | Update | - |
| article html file updated | 22 June 2017 08:59 CEST | Original file | - |
| article xml uploaded. | 22 June 2017 08:58 CEST | Update | https://www.mdpi.com/2227-9067/4/6/50/xml |
| article pdf uploaded. | 22 June 2017 08:58 CEST | Updated version of record | https://www.mdpi.com/2227-9067/4/6/50/pdf |
| article pdf uploaded. | 20 June 2017 16:05 CEST | Version of Record | https://www.mdpi.com/2227-9067/4/6/50/pdf-vor |
