| article html file updated | 6 February 2020 05:05 CET | Update | https://www.mdpi.com/2073-4352/3/4/517 |
| article html file updated | 7 May 2019 22:57 CEST | Update | N/A |
| article html file updated | 21 March 2019 06:27 CET | Update | N/A |
| article html file updated | 17 June 2015 14:10 CEST | Update | N/A |
| article html file updated | 24 June 2014 12:05 CEST | Original file | N/A |
| article xml file uploaded | 24 June 2014 12:05 CEST | Original file | https://www.mdpi.com/2073-4352/3/4/517/xml |
| article pdf uploaded. | 22 October 2013 17:39 CEST | Version of Record | https://www.mdpi.com/2073-4352/3/4/517/pdf |
