| article html file updated | 8 February 2020 09:55 CET | Update | https://www.mdpi.com/2220-9964/6/7/199 |
| article html file updated | 25 September 2019 17:17 CEST | Update | - |
| article html file updated | 3 May 2019 14:22 CEST | Update | - |
| article html file updated | 31 July 2017 07:38 CEST | Update | - |
| article html file updated | 3 July 2017 11:29 CEST | Original file | - |
| article xml uploaded. | 3 July 2017 11:27 CEST | Original file | https://www.mdpi.com/2220-9964/6/7/199/xml |
| article pdf uploaded. | 3 July 2017 11:27 CEST | Version of Record | https://www.mdpi.com/2220-9964/6/7/199/pdf |
