| article html file updated | 5 February 2020 12:08 CET | Update | https://www.mdpi.com/1420-3049/6/12/M268 |
| article html file updated | 18 September 2019 17:42 CEST | Update | - |
| article html file updated | 9 May 2019 11:41 CEST | Update | - |
| article html file updated | 19 March 2019 18:14 CET | Update | - |
| article html file updated | 23 September 2017 08:32 CEST | Original file | - |
| article xml uploaded. | 23 September 2017 08:31 CEST | Original file | https://www.mdpi.com/1420-3049/6/12/M268/xml |
| article pdf uploaded. | 20 June 2014 10:34 CEST | Version of Record | https://www.mdpi.com/1420-3049/6/12/M268/pdf |
