| article html file updated | 7 February 2020 04:37 CET | Update | https://www.mdpi.com/1420-3049/21/2/220 |
| article html file updated | 21 September 2019 11:24 CEST | Update | - |
| article html file updated | 6 May 2019 00:14 CEST | Update | - |
| article html file updated | 26 March 2019 20:50 CET | Update | - |
| article html file updated | 17 September 2018 03:15 CEST | Original file | - |
| article pdf uploaded. | 16 February 2016 10:59 CET | Version of Record | https://www.mdpi.com/1420-3049/21/2/220/pdf |
| article xml uploaded. | 16 February 2016 10:59 CET | Original file | https://www.mdpi.com/1420-3049/21/2/220/xml |
