| article html file updated | 8 February 2020 09:45 CET | Update | https://www.mdpi.com/2227-9067/4/7/55 |
| article html file updated | 25 September 2019 16:19 CEST | Update | - |
| article html file updated | 3 May 2019 14:41 CEST | Update | - |
| article html file updated | 28 July 2017 11:10 CEST | Update | - |
| article html file updated | 5 July 2017 11:35 CEST | Update | - |
| article xml uploaded. | 5 July 2017 11:34 CEST | Update | https://www.mdpi.com/2227-9067/4/7/55/xml |
| article pdf uploaded. | 5 July 2017 11:34 CEST | Updated version of record | https://www.mdpi.com/2227-9067/4/7/55/pdf |
| article html file updated | 30 June 2017 14:47 CEST | Original file | - |
| article pdf uploaded. | 30 June 2017 14:46 CEST | Version of Record | https://www.mdpi.com/2227-9067/4/7/55/pdf-vor |
