| article html file updated | 8 February 2020 14:33 CET | Update | https://www.mdpi.com/2227-9067/4/9/76 |
| article html file updated | 3 May 2019 05:01 CEST | Update | - |
| article html file updated | 30 September 2017 10:18 CEST | Update | - |
| article html file updated | 29 August 2017 12:11 CEST | Original file | - |
| article xml uploaded. | 29 August 2017 12:10 CEST | Original file | https://www.mdpi.com/2227-9067/4/9/76/xml |
| article pdf uploaded. | 29 August 2017 12:10 CEST | Updated version of record | https://www.mdpi.com/2227-9067/4/9/76/pdf |
| article pdf uploaded. | 25 August 2017 16:28 CEST | Version of Record | https://www.mdpi.com/2227-9067/4/9/76/pdf-vor |
