| article html file updated | 6 February 2020 02:33 CET | Update | https://www.mdpi.com/1420-3049/18/6/6734 |
| article html file updated | 19 September 2019 21:36 CEST | Update | - |
| article html file updated | 8 May 2019 04:14 CEST | Update | - |
| article html file updated | 20 March 2019 23:36 CET | Update | - |
| article html file updated | 17 September 2018 05:55 CEST | Original file | - |
| article pdf uploaded. | 7 June 2013 11:07 CEST | Version of Record | https://www.mdpi.com/1420-3049/18/6/6734/pdf |
