| article html file updated | 8 February 2020 12:58 CET | Update | https://www.mdpi.com/2227-9067/4/8/71 |
| article html file updated | 26 September 2019 09:50 CEST | Update | - |
| article html file updated | 3 May 2019 08:05 CEST | Update | - |
| article html file updated | 27 March 2019 19:38 CET | Update | - |
| article html file updated | 1 September 2017 08:26 CEST | Update | - |
| article html file updated | 7 August 2017 15:23 CEST | Original file | - |
| article xml uploaded. | 7 August 2017 15:22 CEST | Original file | https://www.mdpi.com/2227-9067/4/8/71/xml |
| article pdf uploaded. | 7 August 2017 15:22 CEST | Updated version of record | https://www.mdpi.com/2227-9067/4/8/71/pdf |
