| article html file updated | 7 February 2020 17:04 CET | Update | https://www.mdpi.com/2076-0760/5/4/69 |
| article html file updated | 5 May 2019 00:17 CEST | Update | - |
| article html file updated | 27 October 2016 13:12 CEST | Original file | - |
| article xml uploaded. | 27 October 2016 13:10 CEST | Original file | https://www.mdpi.com/2076-0760/5/4/69/xml |
| article pdf uploaded. | 27 October 2016 13:10 CEST | Version of Record | https://www.mdpi.com/2076-0760/5/4/69/pdf |
