| article html file updated | 6 February 2020 01:50 CET | Update | https://www.mdpi.com/2075-1729/3/2/321 |
| article html file updated | 8 May 2019 05:40 CEST | Update | N/A |
| article html file updated | 20 March 2019 21:52 CET | Update | N/A |
| article html file updated | 17 June 2015 08:56 CEST | Update | N/A |
| article html file updated | 24 July 2014 10:33 CEST | Original file | N/A |
| article xml file uploaded | 24 July 2014 10:33 CEST | Original file | https://www.mdpi.com/2075-1729/3/2/321/xml |
| article pdf uploaded. | 29 April 2013 14:24 CEST | Version of Record | https://www.mdpi.com/2075-1729/3/2/321/pdf |
