| article html file updated | 8 February 2020 06:26 CET | Update | https://www.mdpi.com/2227-9067/4/5/42 |
| article html file updated | 24 September 2019 22:56 CEST | Update | - |
| article html file updated | 3 May 2019 20:55 CEST | Update | - |
| article html file updated | 31 May 2017 06:35 CEST | Update | - |
| article html file updated | 22 May 2017 12:57 CEST | Original file | - |
| article xml uploaded. | 22 May 2017 12:56 CEST | Original file | https://www.mdpi.com/2227-9067/4/5/42/xml |
| article pdf uploaded. | 22 May 2017 12:56 CEST | Version of Record | https://www.mdpi.com/2227-9067/4/5/42/pdf |
