| article html file updated | 7 February 2020 16:54 CET | Update | https://www.mdpi.com/2076-0760/5/4/67 |
| article html file updated | 5 May 2019 00:36 CEST | Update | N/A |
| article html file updated | 25 October 2016 09:20 CEST | Original file | N/A |
| article xml uploaded. | 25 October 2016 09:19 CEST | Original file | https://www.mdpi.com/2076-0760/5/4/67/xml |
| article pdf uploaded. | 25 October 2016 09:19 CEST | Version of Record | https://www.mdpi.com/2076-0760/5/4/67/pdf |
