| article html file updated | 8 February 2020 07:56 CET | Update | https://www.mdpi.com/2227-9067/4/6/48 |
| article html file updated | 25 September 2019 06:38 CEST | Update | - |
| article html file updated | 3 May 2019 18:05 CEST | Update | - |
| article html file updated | 27 June 2017 10:02 CEST | Update | - |
| article html file updated | 12 June 2017 09:37 CEST | Original file | - |
| article xml uploaded. | 12 June 2017 09:35 CEST | Original file | https://www.mdpi.com/2227-9067/4/6/48/xml |
| article pdf uploaded. | 12 June 2017 09:35 CEST | Updated version of record | https://www.mdpi.com/2227-9067/4/6/48/pdf |
| article pdf uploaded. | 9 June 2017 16:05 CEST | Version of Record | https://www.mdpi.com/2227-9067/4/6/48/pdf-vor |
