| article html file updated | 8 February 2020 08:29 CET | Update | https://www.mdpi.com/2072-6643/9/6/621 |
| article html file updated | 25 September 2019 09:26 CEST | Update | - |
| article html file updated | 3 May 2019 17:06 CEST | Update | - |
| article html file updated | 29 June 2017 11:47 CEST | Update | - |
| article html file updated | 19 June 2017 03:48 CEST | Original file | - |
| article xml uploaded. | 19 June 2017 03:47 CEST | Update | https://www.mdpi.com/2072-6643/9/6/621/xml |
| article pdf uploaded. | 19 June 2017 03:47 CEST | Updated version of record | https://www.mdpi.com/2072-6643/9/6/621/pdf |
| article pdf uploaded. | 16 June 2017 11:51 CEST | Version of Record | https://www.mdpi.com/2072-6643/9/6/621/pdf-vor |
