| article html file updated | 6 February 2020 02:04 CET | Update | https://www.mdpi.com/1996-1944/6/5/1980 |
| article html file updated | 8 May 2019 05:13 CEST | Update | - |
| article html file updated | 20 March 2019 22:28 CET | Update | - |
| article html file updated | 13 January 2017 08:19 CET | Original file | - |
| article pdf uploaded. | 15 May 2013 11:14 CEST | Version of Record | https://www.mdpi.com/1996-1944/6/5/1980/pdf |
