| article html file updated | 8 February 2020 09:27 CET | Update | https://www.mdpi.com/2227-9067/4/7/54 |
| article html file updated | 25 September 2019 14:37 CEST | Update | - |
| article html file updated | 3 May 2019 15:15 CEST | Update | - |
| article html file updated | 28 July 2017 11:10 CEST | Update | - |
| article html file updated | 29 June 2017 10:05 CEST | Original file | - |
| article xml uploaded. | 29 June 2017 10:03 CEST | Original file | https://www.mdpi.com/2227-9067/4/7/54/xml |
| article pdf uploaded. | 29 June 2017 10:03 CEST | Updated version of record | https://www.mdpi.com/2227-9067/4/7/54/pdf |
| article pdf uploaded. | 28 June 2017 11:34 CEST | Version of Record | https://www.mdpi.com/2227-9067/4/7/54/pdf-vor |
