| article html file updated | 7 February 2020 05:01 CET | Update | https://www.mdpi.com/1420-3049/21/3/257 |
| article html file updated | 21 September 2019 11:59 CEST | Update | - |
| article html file updated | 5 May 2019 23:18 CEST | Update | - |
| article html file updated | 26 March 2019 21:41 CET | Update | - |
| article html file updated | 17 September 2018 02:55 CEST | Update | - |
| article html file updated | 31 March 2016 02:46 CEST | Original file | - |
| article pdf uploaded. | 25 February 2016 13:33 CET | Version of Record | https://www.mdpi.com/1420-3049/21/3/257/pdf |
| article xml uploaded. | 25 February 2016 13:33 CET | Original file | https://www.mdpi.com/1420-3049/21/3/257/xml |
