| article html file updated | 7 February 2020 03:32 CET | Update | https://www.mdpi.com/2076-0787/5/1/7 |
| article html file updated | 6 May 2019 02:22 CEST | Update | N/A |
| article html file updated | 26 March 2019 18:42 CET | Original file | N/A |
| article xml uploaded. | 18 January 2016 09:45 CET | Original file | https://www.mdpi.com/2076-0787/5/1/7/xml |
| article pdf uploaded. | 18 January 2016 09:45 CET | Version of Record | https://www.mdpi.com/2076-0787/5/1/7/pdf |
