| article html file updated | 6 February 2020 10:33 CET | Update | https://www.mdpi.com/2073-4352/4/3/241 |
| article html file updated | 7 May 2019 11:55 CEST | Update | N/A |
| article html file updated | 21 March 2019 20:27 CET | Update | N/A |
| article html file updated | 20 August 2015 12:13 CEST | Original file | N/A |
| article pdf uploaded. | 8 July 2014 15:41 CEST | Version of Record | https://www.mdpi.com/2073-4352/4/3/241/pdf |
