| article html file updated | 7 February 2020 11:23 CET | Update | https://www.mdpi.com/2076-3387/6/3/8 |
| article html file updated | 5 May 2019 10:44 CEST | Update | - |
| article html file updated | 27 March 2019 09:41 CET | Update | - |
| article html file updated | 27 October 2017 09:19 CEST | Update | - |
| article html file updated | 8 July 2016 09:47 CEST | Original file | - |
| article xml uploaded. | 8 July 2016 09:46 CEST | Original file | https://www.mdpi.com/2076-3387/6/3/8/xml |
| article pdf uploaded. | 8 July 2016 09:46 CEST | Version of Record | https://www.mdpi.com/2076-3387/6/3/8/pdf |
