| article html file updated | 8 February 2020 09:59 CET | Update | https://www.mdpi.com/2076-0787/6/3/45 |
| article html file updated | 3 May 2019 14:15 CEST | Update | - |
| article html file updated | 3 July 2017 15:46 CEST | Original file | - |
| article xml uploaded. | 3 July 2017 15:45 CEST | Original file | https://www.mdpi.com/2076-0787/6/3/45/xml |
| article pdf uploaded. | 3 July 2017 15:45 CEST | Version of Record | https://www.mdpi.com/2076-0787/6/3/45/pdf |
