| article html file updated | 6 February 2020 05:06 CET | Update | https://www.mdpi.com/2073-4468/2/4/554 |
| article html file updated | 7 May 2019 22:56 CEST | Update | - |
| article html file updated | 21 March 2019 06:31 CET | Update | - |
| article html file updated | 17 June 2015 14:12 CEST | Update | - |
| article html file updated | 27 November 2014 04:17 CET | Original file | - |
| article xml file uploaded | 27 November 2014 04:17 CET | Original file | https://www.mdpi.com/2073-4468/2/4/554/xml |
| article pdf uploaded. | 23 October 2013 13:49 CEST | Version of Record | https://www.mdpi.com/2073-4468/2/4/554/pdf |
