| article html file updated | 7 February 2020 03:08 CET | Update | https://www.mdpi.com/2073-4352/6/1/9 |
| article html file updated | 6 May 2019 03:09 CEST | Update | N/A |
| article html file updated | 26 March 2019 17:53 CET | Original file | N/A |
| article pdf uploaded. | 6 January 2016 15:20 CET | Version of Record | https://www.mdpi.com/2073-4352/6/1/9/pdf |
| article xml uploaded. | 6 January 2016 15:20 CET | Original file | https://www.mdpi.com/2073-4352/6/1/9/xml |
