| article html file updated | 8 February 2020 07:35 CET | Update | https://www.mdpi.com/2075-4701/7/6/209 |
| article html file updated | 25 September 2019 04:52 CEST | Update | - |
| article html file updated | 3 May 2019 18:45 CEST | Update | - |
| article html file updated | 28 June 2017 14:01 CEST | Update | - |
| article html file updated | 7 June 2017 13:36 CEST | Original file | - |
| article xml uploaded. | 7 June 2017 13:35 CEST | Update | https://www.mdpi.com/2075-4701/7/6/209/xml |
| article pdf uploaded. | 7 June 2017 13:35 CEST | Updated version of record | https://www.mdpi.com/2075-4701/7/6/209/pdf |
| article pdf uploaded. | 6 June 2017 12:35 CEST | Version of Record | https://www.mdpi.com/2075-4701/7/6/209/pdf-vor |
