| article html file updated | 6 February 2020 00:28 CET | Update | https://www.mdpi.com/2075-1729/3/1/189 |
| article html file updated | 8 May 2019 08:38 CEST | Update | - |
| article html file updated | 20 March 2019 18:26 CET | Update | - |
| article html file updated | 17 June 2015 06:20 CEST | Update | - |
| article html file updated | 24 July 2014 10:32 CEST | Original file | - |
| article xml file uploaded | 24 July 2014 10:32 CEST | Original file | https://www.mdpi.com/2075-1729/3/1/189/xml |
| article pdf uploaded. | 8 February 2013 14:16 CET | Updated version of record | https://www.mdpi.com/2075-1729/3/1/189/pdf |
| article pdf uploaded. | 7 February 2013 09:23 CET | Version of Record | - |
