| article html file updated | 7 February 2020 04:30 CET | Update | https://www.mdpi.com/1420-3049/21/2/209 |
| article html file updated | 21 September 2019 11:13 CEST | Update | - |
| article html file updated | 6 May 2019 00:30 CEST | Update | - |
| article html file updated | 26 March 2019 20:35 CET | Update | - |
| article html file updated | 17 September 2018 03:11 CEST | Original file | - |
| article pdf uploaded. | 19 February 2016 07:45 CET | Updated version of record | https://www.mdpi.com/1420-3049/21/2/209/pdf |
| article xml uploaded. | 19 February 2016 07:45 CET | Original file | https://www.mdpi.com/1420-3049/21/2/209/xml |
| article pdf uploaded. | 10 February 2016 08:39 CET | Version of Record | https://www.mdpi.com/1420-3049/21/2/209/pdf-vor |
