| article html file updated | 6 February 2020 03:31 CET | Update | https://www.mdpi.com/2075-1729/3/3/449 |
| article html file updated | 8 May 2019 02:18 CEST | Update | N/A |
| article html file updated | 21 March 2019 02:10 CET | Update | N/A |
| article html file updated | 17 June 2015 11:50 CEST | Update | N/A |
| article html file updated | 24 July 2014 10:34 CEST | Original file | N/A |
| article xml file uploaded | 24 July 2014 10:34 CEST | Original file | https://www.mdpi.com/2075-1729/3/3/449/xml |
| article pdf uploaded. | 30 July 2013 11:00 CEST | Version of Record | https://www.mdpi.com/2075-1729/3/3/449/pdf |
