| article html file updated | 6 February 2020 02:27 CET | Update | https://www.mdpi.com/1420-3049/18/6/6504 |
| article html file updated | 19 September 2019 21:26 CEST | Update | - |
| article html file updated | 8 May 2019 04:27 CEST | Update | - |
| article html file updated | 20 March 2019 23:21 CET | Update | - |
| article html file updated | 17 September 2018 05:43 CEST | Update | - |
| article html file updated | 20 December 2016 04:24 CET | Original file | - |
| article pdf uploaded. | 3 June 2013 11:11 CEST | Version of Record | https://www.mdpi.com/1420-3049/18/6/6504/pdf |
