| article html file updated | 6 February 2020 01:12 CET | Update | https://www.mdpi.com/1996-1944/6/4/1237 |
| article html file updated | 8 May 2019 06:58 CEST | Update | N/A |
| article html file updated | 20 March 2019 20:14 CET | Update | N/A |
| article html file updated | 17 February 2017 06:49 CET | Original file | N/A |
| article pdf uploaded. | 25 March 2013 18:23 CET | Version of Record | https://www.mdpi.com/1996-1944/6/4/1237/pdf |
